Originally Posted by
Pop N Wood
Google "exit bag".
Nitrogen is also being proposed to replace lethal injection for death penalty cases.
Dangerous stuff.
Yes, a big tank of liquid nitrogen that blows out a safety valve would quickly displace virtually all the oxygen in an elevator in seconds. Compressed gas cylinders would do the same if they had a catastrophic failure and spewed their contents. Hence my point about not riding in elevators with any compressed or liquified gasses.