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Yep, NO. I've tried it. You can't get a breath and you feel like you're suffocating.
Nitrogen hypoxia is a risk wherever liquid nitrogen is used. If too much boils too fast, it will displace the oxygen in the room. People in the room won't even realize what happened until they pass out and die shortly thereafter.
There are reports of people rushing in to rescue those who passed out, and suddenly passing out themselves and needing to be rescued as well. That's how insidious it is. And that's why MRI scanners (which use liquid nitrogen) have oxygen sensors in the room. You can't trust your own body to tell you that all the oxygen is gone.
MRI machines are cooled by liquid helium. Nitrogen is not cold enough. I'd imagine as a noble gas it has a similar effect though.
They are cooled by liquid helium, but also have a liquid nitrogen outer dewar as well with a vacuum insulator in between. The N2 takes the brunt of the ambient heat so you don’t have to top off the (much more expensive) helium as often.
Definitely doesn't seem terribly traumatic - https://youtu.be/176eog7mZjc?si=B4TPpWw7CJb-IGXl
(CW - shows pig putting its head into a box filled with inert gas to eat food. The pig falls over, regains consciousness, then immediately places its head back into the box to continue eating)
Can you please share more of your experience? What was the occasion and the set-up? What was it like?
That's not the case with nitrogen asphyxiation.
Sure, Jan.
I'm willing to bet what you inhaled was carbon dioxide -- that gives an instant feeling of suffocation. Which ironically makes it one of the safer asphyxiant gasses, as it's heavier than air and you can detect it's presence instantly. Inert ("noble") gasses like helium, argon, and nitrogen don't have that effect.
CO2 is also cheap, readily available, non-toxic, and doesn't cause physical damage. This makes CO2 asphyxiation somewhat popular for "stunning" or killing in places like slaughterhouses, labs working with smaller animals, or "feeder" animals for reptiles.