Method Exit bag and inert gas megathread

[HouseofMortok]

SCBA, just asking if anyone knows about how to remove hoses from the regulator and reinstall them?
Like the Lung demand valve & pressure gauge hoses.

View attachment 165699

No screws on the side? Mine has a plastic cover screwed on the sides, under this cover is a staple that slots into 2 holes, holding the hoses into the reg. Mine isn't the same model as yours though, but they should indeed come apart for cleaning sakes of fire fighters using them.

 

[BaharKoChala]

Okay so I've decided to go using the Exit Bag method. The bag is made and all other preparations are done. Only thing is for gas I can only source Helium Tanks (more particularly one named "AiRise Large Portable Helium Tank") which claims it can fill upto 27 18inch ballons. I can get as many of them as needed, how many would I need to ensure safe passage (and obviously with these I can't use a regulator so that has to be kept in mind)

If anyone can help me I would be very grateful!

Anyone?

 

[timechained]

Anyone?

I am currently going though the same dilemma.

I plan on using a scuba mask with 3.3L whipped cream nitrogen tank.

I don't know if it will be enough since the PPEH recommends significantly more gas, but that's with 2m tubing, mine will be with about ~40cm tubing.

 

[devils~advocate]

SCBA, there is a way to remove hoses from the regulator and reinstall them?



On the scba model that I have, the hoses for the LDV (lung demand valve) & pressure gauge can be removed and reinstalled in other scba system by the same manufacturer.
In this case it is Dr@ger.

1 & 2 - There are small black covers that are taken off by removing small socket screws. I believe the screws are 2mm hex sockets.

3 - Then there is a large staple looking item that keeps the hose barb locked into regulator port. It can be removed by prying it up with a screw driver or knife.

4 - The barb end of the hose can be retracted from the regulator.

7 - This is the barb end of the LDV hose. It is made to only fit into the port for the LDV hose. The pressure gauge looks different but is removed/installed the same way.

8 - The barb end of the LDV hose has a small spring and a washer seal. These parts can be obtained, but usually in large quantities.





Below is what the barb end of the pressure gauge looks like. It is made to only fit into the port for the pressure gauge.



SCBA Parts Diagram

https://pojaru.net.ru/_fr/14/PSS_3000_pneuma.pdf

 

[Intoxicated]

I plan on using a scuba mask with 3.3L whipped cream nitrogen tank.

Canisters for whipped cream contain nitrous oxide, not nitrogen. When stored under proper conditions (below the critical temperature, 36.42 °C), N2O is mostly contained in the form of liquid with a relatively few amount of gas (saturated vapors) above it. The pressure of vapors may vary between 31 and 72 bars at temperatures in the range 0 - 36.42 °C. 3.3 L is just the capacity of your canister, not the volume of liquid N2O. The actual volume of gaseous N2O after expansion and delivering to an exit bag or a mask should be estimated based on the mass of the substance rather than the container capacity. 2000 g of N2O is approximately 45 moles or 1 cubic meter of gas at 1 atm and 0 °C.

This differs from pressurized nitrogen, which is contained in a cylinder in the form of either supercritical fluid (above the critical pressure, 33.5 atm) or gas. Liquid N2O has a much higher expansion ratio than nitrogen SCF at 100 - 250 bars, hence nitrogen cylinders commonly have to be of a greater capacity in order to be able to hold a comparable amount of gas. For example, 1 cubic meter of nitrogen can be compressed into 5 L at 200 bars.

I don't know if it will be enough since the PPEH recommends significantly more gas

Significantly more than what? PPEH says "A 2-liter gas cylinder provides a suitable gas source ... When filled under pressure of 200 bar, these take-home cylinders contain around 420 liters of nitrogen. This provides ~30 minutes of gas flow: more than enough for a peaceful death".

 

[timechained]

Nice call out.

In another thread I am not as careless.

I should have said nitrous not nitrogen tank, and also I should have said pressure not more gas.

 

[quietbird]

Hello. I was going to do the same thing with the car, but not in the house since it would make the house value go down from what I read from other people and I want my children to have more money as the move on. Everything I have read is that the best position in to be seated with the tank restrained so that it does not fall over once the body starts to move once you have passed out.
I will also be using zip ties for my hands, one hand zip tied to the chair and the other zip tied to the other hand. It is very easy.
I tested the bag and the tank and within 40 seconds, my oxygen levels fell to 47%. I am confident that this will work for me.

Some people cannot afford the cost of everything while others don't have the dexterity to make sure everything is connected properly.

I hope to be gone soon. I can't stand myself any longer.

Why do they say to do it sitting up? Won't a person fall over?

General questions for anyone:
what happens to your brain if you are found and the attempt fails?

In the us do different nitrogen and helium tanks all have different valves/connectors depending on brand etc? So you'd have to buy that first and work on building backwards from there?

 

[AllAloneAndSad]

Why do they say to do it sitting up? Won't a person fall over?

General questions for anyone:
what happens to your brain if you are found and the attempt fails?

In the us do different nitrogen and helium tanks all have different valves/connectors depending on brand etc? So you'd have to buy that first and work on building backwards from there?

If you go to a company that sells gasses, (like for welding), the connection is standard. I bought the regulator from them which was costly and it not what I needed. I ended up buying my second regulator from Amaz*n. In my case, the seatbelt would hold the tank so that it doesn't tip over. I would secure the tank in some way so that it doesn't go rolling off and pulling the hose. I really do not know why it is recommended to be sitting up but all I read was that it is better sitting up. I have seen several where the people are in their beds.

If they discover you and you have passed out, there could be severe consequences to the brain. The brain is left without oxygen and it begins to shut down. It is a 10 to 15 minute process, but just to make sure, the tank will probably keep on going (depending on the size 40cf) for a total of 40 minutes or more

 

[NegevChina]

General questions for anyone:
what happens to your brain if you are found and the attempt fails?

Failed attempt brain damage degree depends on how long Oxygen was missing. Its a scale form no damage at all on one side to becoming a vegetable or brain dead on the other side. A member here on SanSui had a failed attempt and only suffered minor damage that caused him difficulty in speaking.

 

[quietbird]

If you go to a company that sells gasses, (like for welding), the connection is standard. I bought the regulator from them which was costly and it not what I needed. I ended up buying my second regulator from Amaz*n. In my case, the seatbelt would hold the tank so that it doesn't tip over. I would secure the tank in some way so that it doesn't go rolling off and pulling the hose. I really do not know why it is recommended to be sitting up but all I read was that it is better sitting up. I have seen several where the people are in their beds.

If they discover you and you have passed out, there could be severe consequences to the brain. The brain is left without oxygen and it begins to shut down. It is a 10 to 15 minute process, but just to make sure, the tank will probably keep on going (depending on the size 40cf) for a total of 40 minutes or more

I was thinking of buying one online - I see one that's labeled

Nitrogen Hydrogen 95% N2 and 5% H

but is that bad to have the Hydrogen in there? It offers a valve or dispenser, but I would order a different kind that's posted in here? I am worried that the tank would go bad after a year, so was going to wait to order.

I'm still in the process of going through this thread and a few others on this topic. I know that I need Nitrogen and not Helium, and I have the amount, and schematics. I need to organize my notes.

I am less worried about being discovered than somehow flailing the bag off and then being left there unable to try again. Or maybe even being unable to get up at all, left in pain/a daze for a day until discovered. So the main worry is killing only part of your brain, yeah?

I am looking at the hood option but if that's harder to construct I may not figure that out.

Thank you so much for your reply btw.

 

[AllAloneAndSad]

If it is 95% nitrogen, it should do the trick. You have to see how big it is. It has to be 15 l/m and so I had to buy the regulator for CO2 and Argon in one unit. Nitrogen, as far as I investigated, does not go bad.

Look here. I miss ShatteredSerenity.

Just finished putting together a nitrogen exit bag setup

I just thought I'd share a description of the gear I put together for inert gas asphyxiation with nitrogen and an exit bag. It's pretty basic since I felt it would be better to start with something simple and functional, then upgrade to SCBA/SCUBA or something else in the future if I have time...

sanctioned-suicide.net

 

[quietbird]

I

If it is 95% nitrogen, it should do the trick. You have to see how big it is. It has to be 15 l/m and so I had to buy the regulator for CO2 and Argon in one unit. Nitrogen, as far as I investigated, does not go bad.

Look here. I miss ShatteredSerenity.

Just finished putting together a nitrogen exit bag setup

I just thought I'd share a description of the gear I put together for inert gas asphyxiation with nitrogen and an exit bag. It's pretty basic since I felt it would be better to start with something simple and functional, then upgrade to SCBA/SCUBA or something else in the future if I have time...

sanctioned-suicide.net

I was confused why it was nitrogen and some hydrogen together, but I'll have to research that a bit more. Thank you.

That's a post I have bookmarked, it's very organized and helpful. He was clearly a good writer. I'm sorry you lost him, and hope he is at peace.

Failed attempt brain damage degree depends on how long Oxygen was missing. Its a scale form no damage at all on one side to becoming a vegetable or brain dead on the other side. A member here on SanSui had a failed attempt and only suffered minor damage that caused him difficulty in speaking.

Scary, but it makes sense.

 

[NegevChina]

Look here. I miss ShatteredSerenity.

I miss him to!
Though he chose SN eventually, I've got a Nitrogen system all ready for when I need it, mostly thanks to ShatteredSerenity's knowledge he shared here.

 

[endlive32]

My experience was that I soon began to feel tingling in my hands, as if they were falling asleep. A short moment later I began to get dizzy, and my vision went grey around the edges. Each of the three times I have attempted this method, that's as far as I got before I flinched and removed the bag.

I did not experience any pain whatsoever, and no real discomfort aside from the mild tingling in my hands.

I do not believe I have suffered any ill effects from three aborted attempts. I had a bit of a cough for a couple days after my third attempt, but I can't say for sure whether that was attributable to the N2. It concerns me only in that this method demands that you be able to breathe freely in order for it to be effective, and I don't want to have ruined my chances to use it later, when I have summoned my courage.

My greatest difficulty is that I have been very stressed during my attempts, and could not keep my breathing steady and deep. This undoubtedly lengthened the amount of time it should have taken for me to black out.

In the stress of the situation, I experienced time dilation —in other words, I can't tell you how long it took for me to feel dizzy; it might have been five seconds, it might have been a minute and a half. It wasn't very long —but it was long enough for me to flinch.

From my experience, this is as painless, comfortable, and potentially peaceful a way to ctb as it is rumored to be. The only drawbacks that I can see are that it requires a lot of equipment —cylinder, regulator, hose, bag— and that there is a surprising amount of time for your survival instinct to kick in, or for second thoughts.

As I wrote at the beginning, I hope other forum members can fill in some of the blanks I have left —specifically, I have seen a lot of questions about tank sizes outside the US that I cannot answer.

I don't wish anyone good luck at catching the bus. I wish we could all find our way to a joyous and satisfying life that would make death an unfortunate reality rather than a longed-for relief. But all of us here know that the Fates aren't always that kind, and so I wish you all the most peaceful relief from your pain that you can find, and if that peace is brought by Death, I hope Death comes gently.

Is easy o posible do it with a cpap no vented mask and helium?

 

[SomewhereAlongThe]

Guys, what can I do about the tube in my exit bag? It's this one:

Amazon.ca

And it's not too big but when it's attached to my exit bag, there's a gap I'm concerned about, my bag still inflates within 2 minutes, but when I press on the gap the bag inflates faster. I'm afraid this will happen with any tubing I use, so what do I do? Even when I'm scrunching the bag down, I feel all the air exit through the gap where the tube is.

Is this normal?

 

[AllAloneAndSad]

I miss him to!
Though he chose SN eventually, I've got a Nitrogen system all ready for when I need it, mostly thanks to ShatteredSerenity's knowledge he shared here.

Yes...he went with SN. I have my set up and it helped with the calculations for the regulator. I feel I have the whole set-up complete! What he wrote is tremendous.

I

I was confused why it was nitrogen and some hydrogen together, but I'll have to research that a bit more. Thank you.

That's a post I have bookmarked, it's very organized and helpful. He was clearly a good writer. I'm sorry you lost him, and hope he is at peace.

Scary, but it makes sense.

There is nothing that is 100% proven to work. There is always a chance of survival. You may want to look at the PPH.

 

[AllAloneAndSad]

Guys, what can I do about the tube in my exit bag? It's this one:

Amazon.ca

And it's not too big but when it's attached to my exit bag, there's a gap I'm concerned about, my bag still inflates within 2 minutes, but when I press on the gap the bag inflates faster. I'm afraid this will happen with any tubing I use, so what do I do? Even when I'm scrunching the bag down, I feel all the air exit through the gap where the tube is.

Is this normal?

I depends ...what is the diameter of the hose? There should be a 2 finger gap to allow the CO2 to exit the bag and replace it with nitrogen.Mine also fills up in about 2 minutes at 15 l/m and it stays inflated when I pull it down to my neck.

 

[NegevChina]

Guys, what can I do about the tube in my exit bag? It's this one:

Amazon.ca

And it's not too big but when it's attached to my exit bag, there's a gap I'm concerned about, my bag still inflates within 2 minutes, but when I press on the gap the bag inflates faster. I'm afraid this will happen with any tubing I use, so what do I do? Even when I'm scrunching the bag down, I feel all the air exit through the gap where the tube is.

Is this normal?

My guess is as long as Nitrogen is coming out of the bag, the air is prevented from entering it. I think if the tubes outlet is at the top of the bag it should be ok and the bag gets full of nitrogen. The direction of the flow of the Nitrogen is from the tube outlet, into the bag, and out from the small gap and around the neck. I've never tested it though, but I'm considering taping the tube to the back of my neck so it doesn't come out of the exit bag when I have involuntary movements.
The professional exit bag looks like this:

Spoiler: Exit Bag

It seems the fitting around the neck is not to tight, and the tube probably creates a small gap.
https://www.researchgate.net/figure...scribed-in-Final-Exit-photo-R-D_fig1_41825378

 

[spinelinthegarden]

Exit Bag and Inert Gas Basics —A very, very long post, I know, but I feel like I've fielded a lot of questions about this, so I figured I'd spell out everything I know. Others on the forum should please add to this thread whatever reliable technical information they feel is appropriate for someone attempting this method to have.

The idea behind using an exit bag with inert gas is to create an atmosphere around your head that is both free of life-sustaining O2 and can carry away the exhaled CO2 that would activate your hypercapnic alarm.

The Gas:

You will need to keep the inert gas flowing at 15 liters per minute (Lpm) for 40 minutes to be confident of ending your life —in other words, you'll need a minimum of 600 liters of inert gas. In the past this would have been helium (He), but due to the uncertain availability of genuinely pure He, the best current options are nitrogen (N2) and argon (Ar). Both are reliably available in pure form (no air contamination) from stores that supply welders. N2 is also available from some brewery supply houses, but the purity of the gas should be confirmed to your satisfaction. Both N2 and Ar should work to ctb and are similar enough in their properties to be treated identically for use with an exit bag.

Pressurized gas cylinder sizes are not standardized across the industry, nor internationally, and it can be difficult, if not impossible, to tell how much gas they contain from a photograph on a website.

In the US, a 20 cubic foot (cf) cylinder is the smallest you should use for ctb; a 40cf will allow some margin for flinching, practicing, etc. "A 20cf" and "a 40cf", or "a 20" and "a 40" is nomenclature US welding supply houses will recognize, so asking for either should get you the desired product. A 20cf cylinder is quite small for industrial use; I've had clerks tell me, "well, we have a 40, but we'll need to special order a 20." It's up to you what you do in that situation. Personally, I have a 40cf cylinder. It has allowed me to flinch and abort my attempt three times now, and I don't need to worry about refilling it. I bought my N2 at AirGas, a national company here in the US. They do not demand any sort of professional certification for purchasing inert gas, and no more than the usual forms of ID depending on payment method.

I know nothing of gas cylinders outside the US, so if you are using other than US-typical cylinders, you'll need to call and ask to make sure whatever tank you're contemplating holds 600L of compressed gas. Hopefully knowledgeable forum members will add cylinder sizing information to this knowledge base.

Cover story: N2 and Ar are both used for welding. N2 is used in beer brewing. In my day job, I use both N2 and Ar to flood partial cans of expensive paint, to displace the O2 in the cans and prevent the paint from skinning over and going bad. It's a cost saving measure. The clerks I've bought gas from have never heard of that trick, which has meant they don't know enough to interrogate me on my motives or to try and quiz me on my welding knowledge. They have merely said, "huh! That's a new one!"

The store clerk may ask how you're carrying the pressurized cylinder "back to your shop," since pressurized cylinders can be very hazardous to transport (the valve is vulnerable to damage in an accident). I haven't had any trouble when I have told the clerk, "in the back footwell of my car, and very carefully padded!" What they really want to know is that you are aware that a pressurized cylinder is a missile waiting to explode if anything damages it, and that you know enough to not let that happen.

My experience was that I soon began to feel tingling in my hands, as if they were falling asleep. A short moment later I began to get dizzy, and my vision went grey around the edges. Each of the three times I have attempted this method, that's as far as I got before I flinched and removed the bag.

I did not experience any pain whatsoever, and no real discomfort aside from the mild tingling in my hands.

I do not believe I have suffered any ill effects from three aborted attempts. I had a bit of a cough for a couple days after my third attempt, but I can't say for sure whether that was attributable to the N2. It concerns me only in that this method demands that you be able to breathe freely in order for it to be effective, and I don't want to have ruined my chances to use it later, when I have summoned my courage.

My greatest difficulty is that I have been very stressed during my attempts, and could not keep my breathing steady and deep. This undoubtedly lengthened the amount of time it should have taken for me to black out.

In the stress of the situation, I experienced time dilation —in other words, I can't tell you how long it took for me to feel dizzy; it might have been five seconds, it might have been a minute and a half. It wasn't very long —but it was long enough for me to flinch.

From my experience, this is as painless, comfortable, and potentially peaceful a way to ctb as it is rumored to be. The only drawbacks that I can see are that it requires a lot of equipment —cylinder, regulator, hose, bag— and that there is a surprising amount of time for your survival instinct to kick in, or for second thoughts.

As I wrote at the beginning, I hope other forum members can fill in some of the blanks I have left —specifically, I have seen a lot of questions about tank sizes outside the US that I cannot answer.

I don't wish anyone good luck at catching the bus. I wish we could all find our way to a joyous and satisfying life that would make death an unfortunate reality rather than a longed-for relief. But all of us here know that the Fates aren't always that kind, and so I wish you all the most peaceful relief from your pain that you can find, and if that peace is brought by Death, I hope Death comes gently.

I attempted two times and failed. Is a helium tank for balloons enough? And also since you have to press the black nozzle to let the helium out, how exactly do you manage to do that?

 

[BaharKoChala]

Guys, what can I do about the tube in my exit bag? It's this one:

Amazon.ca

And it's not too big but when it's attached to my exit bag, there's a gap I'm concerned about, my bag still inflates within 2 minutes, but when I press on the gap the bag inflates faster. I'm afraid this will happen with any tubing I use, so what do I do? Even when I'm scrunching the bag down, I feel all the air exit through the gap where the tube is.

Is this normal?

Offtopic but could you tell me how you sourced Nitrogen in Canada. I am having a hard time. Thanks!

 

[SomewhereAlongThe]

I depends ...what is the diameter of the hose? There should be a 2 finger gap to allow the CO2 to exit the bag and replace it with nitrogen.Mine also fills up in about 2 minutes at 15 l/m and it stays inflated when I pull it down to my neck.

The diameter is 10mm(3/8") outer dia. I have my flow set to 17 lpm because it's an argon regulator, and the conversion is different. Do you think my tubing is too thick? There is definitely a visible gap no bigger than 2 fingers. When I tighten the draw string the bag fills quicker, within two minutes. But if I tighten the drawstring, I assume there wouldn't be a 2 finger gap, only the slight gap where the tubing area is. Is that enough to purge the cO2?

Offtopic but could you tell me how you sourced Nitrogen in Canada. I am having a hard time. Thanks!

I got my gas from a weld tech products inc location in Hamilton. They ask for you to fill out an application form but all you need to do is fill out your name, address and number at most, you can leave the credit check options blank. They will take a $300 deposit from you as a credit payment so that you return the tank. There's also Air Liquide Canada but I'm not sure if they do credit checks before giving the tank to you.

My guess is as long as Nitrogen is coming out of the bag, the air is prevented from entering it. I think if the tubes outlet is at the top of the bag it should be ok and the bag gets full of nitrogen. The direction of the flow of the Nitrogen is from the tube outlet, into the bag, and out from the small gap and around the neck. I've never tested it though, but I'm considering taping the tube to the back of my neck so it doesn't come out of the exit bag when I have involuntary movements.
The professional exit bag looks like this:

Spoiler: Exit Bag

View attachment 166026

It seems the fitting around the neck is not to tight, and the tube probably creates a small gap.
https://www.researchgate.net/figure...scribed-in-Final-Exit-photo-R-D_fig1_41825378

The thing is I have to tighten the drawstring tight around my forehead for the bag to fill at an appropriate time.
The looseness they have in the pic would cause my exit bag to never fill within two minutes.
So I tighten it and then there's still a gap where the tube is the nitrogen escapes through, do you think that's enough?

 

[NegevChina]

At high altitude Oxygen levels get low.
This hypoxia test makes this method look pleasant, the man even said he was happy with out knowing he was near death:

 

[imOK]

There once was a passenger plane where everyone died of hypoxia while the plane kept flying, harrowing story as apparently one flight attendant was still concious (the fighter jets sent to inspect what was going on could see him in the cockpit and he waved at them) as he could get to an oxygen supply, he couldn't land the plane, but managed to control it enough to stop it from crashing in Athens:
https://en.m.wikipedia.org/wiki/Helios_Airways_Flight_522
Even the pilots had no idea what was going on, basically just got confused, passed out, and died.

This is also how people on Mt. Everest often die, as the air up there is basically too thin to support life for a long time.

There also was an accident in 2021 in a poultry plant in the US, six people died. Nitrogen. People basically walked into a space and dropped dead where they stood.

The liquid nitrogen leak occurred shortly after 10:00 a.m. EST.[2] It was falsely initially reported to have been an explosion.[4] The leak occurred in a freezer room at the plant.[7] Three workers entered the freezer room and immediately died of asphyxiation.[1][8] Additional workers subsequently entered the room, two of whom also died immediately.[7] A sixth person died while being transported to the hospital.[4]

It's a death that basically sneaks up on you.

 

[NegevChina]

I guess if done correctly with mo interference this is as peaceful as a method can be.

 

[Intoxicated]

Three workers entered the freezer room and immediately died of asphyxiation

"Immediate" death from asphyxiation is a big exaggeration. The authors of that text must be either clueless about the subject or prone to distort facts for the sake of dramatic effect.

 

[ToANewWorld]

I dont want to get this method nuked. So I deleted my previous comment.

All I will say is that the level of difficulty sourcing what you need for this method is really under appreciated. I can't imagine how stressful it must be to build a 3D gun or purchase SN half away across the world.

Getting everything to execute this method is a super chill and relaxing experience. Only remote drawback is costs I guess and I have some doubts there too. If you are heading out and can come up with $500-$800 give or take you cannot beat this method as far as being streas-free plus and peaceful.

The insistance to go with SN and risk police visits is beyond me.

 

[SomewhereAlongThe]

I guess if done correctly with mo interference this is as peaceful as a method can be.

I wrote you a reply to what you wrote. What do you think?

"The thing is I have to tighten the drawstring tight around my forehead for the bag to fill at an appropriate time.
The looseness they have in the pic would cause my exit bag to never fill within two minutes.
So I tighten it and then there's still a gap where the tube is the nitrogen escapes through, do you think that's enough?"

 

[NegevChina]

I wrote you a reply to what you wrote. What do you think?

"The thing is I have to tighten the drawstring tight around my forehead for the bag to fill at an appropriate time.
The looseness they have in the pic would cause my exit bag to never fill within two minutes.
So I tighten it and then there's still a gap where the tube is the nitrogen escapes through, do you think that's enough?"

Sorry I didn't see your reply.
I think its not supposed to inflate tight like a balloon style. Its just supposed to be full of nitrogen that replaced the air. Its very hard to inflate a bag to be tight if there is a gap. If the Nitrogen flow pushes the air out of the bag it should be sufficient. A constant flow of Nitrogen out of the bag is expected, even if there was no gap. It is not hermetically sealed and is not expected to be pressurized. I haven't tested it yet myself though.

 

[iamgood]

I was thinking of buying one online - I see one that's labeled

Nitrogen Hydrogen 95% N2 and 5% H

but is that bad to have the Hydrogen in there? It offers a valve or dispenser, but I would order a different kind that's posted in here? I am worried that the tank would go bad after a year, so was going to wait to order.

I'm still in the process of going through this thread and a few others on this topic. I know that I need Nitrogen and not Helium, and I have the amount, and schematics. I need to organize my notes.

I am less worried about being discovered than somehow flailing the bag off and then being left there unable to try again. Or maybe even being unable to get up at all, left in pain/a daze for a day until discovered. So the main worry is killing only part of your brain, yeah?

I am looking at the hood option but if that's harder to construct I may not figure that out.

Thank you so much for your reply btw.

hey. Dont use anything containing hydrogen. highly explosive and will seriously injure u and others around you.

 

[Intoxicated]

hey. Dont use anything containing hydrogen. highly explosive and will seriously injure u and others around you.

Hydrogen's flammability range in air is 4 - 75%. In order to ignite the mixture 5% H2 / 95% N2, you'd have to add pure oxygen to it. Air either won't provide a sufficient concentration of O2 for ignition or will dilute that small percent of H2 to a non-flammable gas mixture.