Ah, yes, propane.
Connie, wife of a friend, was making her special cookies, made by dipping an iron pattern in batter, then dip that into a pot of hot oil. Unfortunately she was doing it on her brand new (expensive) Roper range, and she turned her back on it for a minute. The Roper was real hot compared to her old stove, and the oil burst into flame, igniting the decorative baskets hanging from the ceiling and making things too hot for her to get to the brand new industrial size fire extinguisher.
Now right nearby, on the other side of the sliding glass doors was their brand new propane grill - one of these things with a tank under it the size of a beer keg. Well, the fire in the kitchen got it hot and it blew a fitting, which happened to be facing the dining room, and it emptied the whole keg of propane into the house in a matter of seconds. It managed to burn a hole through the floor into the basement, overheating and igniting the gallon cans of solvents Connie had for her pottery making hobby, and they got the stack of cans of paint going.
The fire department was very disappointed. As one of the guys said, "usually most of the damage is water damage, but we couldn't find a damned thing left to damage".
Now, whenever anyone is complaining about problems with their house, we volunteer that Connie could come over and make cookies.
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