Unless they are pressurizing the space the guy is in, nitrogen will just make you black out, without suffering (other than the human knowledge that you are about to die, but that exists with all methods).
No. Perhaps that they are doing it is horrifying, but the way is very humane. It is literally getting loopy and falling asleep, over a very short time period.
No. With the notable exception of rodents, animals generally can't detect oxygen deficiency directly (though they may get loopy).
Nitrogen asphyxiation basically makes you loopy, then unconscious, then dead. It's experientially equivalent to exposure to normal air at extremely high altitudes. Military pilots are often exposed to this (in a controlled manner) precisely because it's so hard to recognize, and doesn't induce fear. Like, epic levels of hard to recognize, as in "Hey Bob, it's time to put your mask back on to keep you from dying!" Bob: snickers and clearly thinks this is a great joke, until the person straps his mask back on, and he realizes how serious the situation is
You can make a trough for a (non-starved) pig that constantly releases nitrogen gas (which it breathes as it's eating). The pig puts his head in the trough to eat, then passes out from lack of oxygen (this pulling it's snout out of the trough), then is like "what was I doing? Oh look, food.." ..and goes right back to it, passing out again.
This is completely different from the reaction to carbon dioxide asphyxiation, which the body has sensors for, and induces all kinds of panic. Try the same trough experiment with a pig using carbon dioxide, and it will stay the fuck away from the evil trough of death.
They can kill an animal (including a mammal) if they become entangled and give up out of suffering, though.
This is pretty rare, but can happen.
It's virtually zero risk to a human, though, who can cognize things like getting their hand disentangled from a string (even in a panic situation), or to most mammals, which tend to jerk backwards on contact.
A longish piece of green grass. Hold it by one end, then slide it on the fence wire like the grass was a violin bow, getting your fingers closer and closer to the fence. At some point you notice a pinging, or your fingers are touching the fence.
You can use this to gauge, very roughly, how powerful the charge is at that point.
Nope, that bastion couldn't tolerate the existence of mutant powers. This bastion, not only has no problem with mutant powers, but downright enjoys them.
Absolutely. Well played, I think that's a great example of the self-referential bullshit feedback loop of sardonic behavior. No actual trigger intended.
Yeah. Pretty fucked system.