SPO Networks Inc (SPOI)

[Bobinsd]

Rusty, if my car was filled with hydrogen and I threw in a match, the match would go out unless there were sufficient oxygen to start the combustion. At that point, the air and the hydrogen would combine (burn) while escaping rapidly up into the atmosphere, leaving a wake of steam and water. There would be no fireworks, and even if there were, you wouldn't see it because the flame is invisible. Only if the windows were shut and oxygen were present already would there be a violent reaction, and only because the other gases in the air would be heated up and expanding. If you are carrying a spare gas can in your car anywhere, that presents much more of a hazard than a tank of hydrogen, which would probably survive the ordinary collision moreso that a plastic container with truly highly combustible contents.