PJP, you meant throw, otherwise I simply cant understand that sentence.
Nitrogen isnt only fun, having a bit respect for it is critical, knowledge of what you are dealing with is always a good thing, no matter what it is anyway....
Vivi, 1 guy coma, 8 others hurt, makes 9 persons to the hospital.
But dafuq, that is really unfortunate, however, swimmingpools contain so freaking many chemicals...
Petri, nitrogen bond with other substances quite easily, and a swimmingpool contains a shiftload of crap.
CO2 however, does not do that easily, if im not mistaking, even in gas form its got London bond.... The same bond that prevents H2O (water) from being highly flamable.