> ... because they are heavier than air. Does anyone have the data to refute these claims? Going up the crazy scale: Has he burst into flames? If no, then air

> ... because they are heavier than air. Does anyone have the data to refute these claims? Going up the crazy scale: Has he burst into flames? If no, then air mixes heavier and lighter components. If yes, then the 21% O2 is actually at the bottom and should be 100% as it is heavier than N2.