[rdcbn1]

I once walked into a pressure vessel filled with nitrogen before the nitrogen was fully purged.

I was out like a light in seconds .

Probably the most humane way to execute a criminal.

Too humane

[rdcbn1]

And cheap too.

You can even re purpose a gas chamber

[rktman]

Couple of guys died on the job entering a non vented space when I was working on the shuttle program. Full of nitrogen.