I know that and even purging helps cool the lines dramatically, I just never liked leaving the bottle open. I have a pressure gauge on the bottle. I never got my bottles to heat that fast, then again they were never left out for long. They always had towels on them and they never saw any heat over 80F. Just sunlight heating a towel over them. When its in the car its ALWAYS covered, unless its empty. Thats crazy it must have been really hot, or you took awhile to eat. I have seen a scuba tank explode does that count? N2O is not flammable so that wouldn't make a fire ball, so i assume its the same. Yes in a scion, and it has a fully built motor with a GT35R turbo.