Yeah. I saw “The Man From LOX”...great training video...did you ever hear the story of how it happened? (this is the story I heard)
It was hot, and the guy wanted to cool off by putting the vent fumes from the LOX into his coveralls...so he unbuttoned it, stuck the end of the hose in and let it vent. Then he went off to have a cigarette...when he lit the match...boom.
That is what I heard, don’t know if it is true or not, but sounds plausible.
My wife has COPD (breathing problem) and carries a neat little flask of LOX slung over her shoulder whenever we go out. Also from time to time we drive around with a tank of about 50 pounds of the stuff in the back of our pickup. No HAZMAT placards of any kind anywhere. This system is far more convenient for the patient than having to use the old heavy tanks, but for someone aware of what LOX can do it does seem a bit scary, especially out in freeway traffic. Just yesterday afternoon I saw some upscale import, Lexus or the like, completely destroyed up to the rear axle, with two fire trucks standing by. Glad it wasn’t our truck.