The Smithsonian Channel has a fascinating show called "Air Disasters" Last episode discussed ValuJet 592 which crashed in the Everglades. There was a fatal mistake in oxygen canisters in the cargo hold: originally labelled as expired, they somehow were mislabeled as empty. FAA tested these 144 expired canisters as originally packed in their special fire test chamber. When ignited, the temperature went off the recordable scale (3000+ degrees) and almost destroyed the FAA chamber. Going back to the flight data recorder, it appeared it took 3 minutes, 42 seconds from the time of ignition to the crash.
Be very cautious when dealing with oxygen - and don't mess around with fire.
Be very cautious when dealing with oxygen - and don't mess around with fire.