Gas inhalation

[Still on bus stop]

I have a butane/propane gas cylinder
Can I CTB?

 

[Joannf]

I have a butane/propane gas cylinder
Can I CTB?

If you bind it around your neck on a wire...
No, seriously... it's an interesting question. usually people take care to get either 'inert gases' for this, or Carbon Monoxide, which is fastest.
Inert gases are Helium or Nitrogen, you inhale them instead of the air, or the CO with the air, but propane/anything but inert.

That doesn't mean it's not possible... so let's wait if someone knows more than I do ;)