Method Nitrous oxide as a method?

[sm1the]

So tilting your head parallel to the floor can counter gas leaking down.
The other concern is the boiling point for this gas is -88c !, use an insulated hose or let the gas in bag warm before use?.

So tilting your head parallel to the floor can counter gas leaking down,thanks.

The other concern is the boiling point for this gas is -88c !, I don't know if this is tolerable(instant frostbite to deal with if u fail)you can use an insulated hose or let the gas in bag warm before use I guess.
As far as bags go,LLDPE (not LDPE) is the material I chose for lowest gas permeation,tear resistance and accessibility(55x 62cm,50micron).

Is there anyway to tell if you got too much air in the bag(after sealing at neck)?.
Is it possible perhaps that if say after a certain time and u are still conscious it means you should consider that too much air entered and abort/start over?.
I could always pump gas while wearing the bag(sealed at neck with small diameter hose inserted at neck area and removed after filling) but having no experience with this gas I'm concerned about frostbite(if I fail)?.

 

[BullsDon'tFly]

Is there anyway to tell if you got too much air in the bag(after sealing at neck)?.
Is it possible perhaps that if say after a certain time and u are still conscious it means you should consider that too much air entered and abort/start over?.
I could always pump gas while wearing the bag(sealed at neck with small diameter hose inserted at neck area and removed after filling) but having no experience with this gas I'm concerned about frostbite(if I fail)?.

The larger the bag, the smaller any leak will affect it.

I don't want to make claims about maximum time required to lose consciousness.

I don't think you should worry about frostbite, no one using compressed gasses mentioned it as a danger. The gas inside the tank is at thermal equilibrium with the room (if I'm not mistaken), but it is contained at around 100x atmospheric pressure. When you let it out, pressure difference between the inert gas and normal air makes it expand and, thus, cool down, but the cooling isn't determined by its vapour point. But even if so, since this method requires to fill the bag before inhaling the gas, one can simply wait for the gas inside the bag to reach room temperature. I don't think it will be necessary tho.