Back when I was a teen, somebody I know well (who shall remain nameless, for reasons that will become obvious) had an old reproduction percussion pistol and supplies that came with it. While cleaning out the basement, he came across about a half pound of powder in a jar , and not wanting to leave it behind , poured it on a snow shovel and said "Hey, watch this.. " and I was about 50 feet away. With a great WHOOSH that half pound.. of black powder.. went up in a ten foot fireball, him stumbling out of it hairless and t-shirt on fire. I grabbed the garden hose and put out the smoking shirt within seconds. I've never heard such a string of F-words chanted repeatedly before or since. He ended up in hospital covered in Flamazine cream for a couple weeks. The kicker, it was a military hospital, and it was the toughest pill to swallow explaining to his co-workers in the Explosives Ordnance Disposal team (EOD) how he'd nearly blown himself up in a moment of incredible stupidity while lighting a pile of black powder with a cigarette lighter..