I jumped off a 60ft cliff into a flooded quarry when I was 18. Not only was the water full of train cars and boulders (kid have died there), but I landed at an angle so that the air in my lungs got slammed against my ribcage (150lbs x 60ft, for the engineers) and hairline fractured my sternum. I still have a calcium deposit in the middle of my chest from where it healed.
My father almost put me through a wall when I told him what I did.
Another time, living in a squat that had been a twice firegutted Southern townhouse, a friend and I made an 11' column of fire shoot out of a teacup. You can make wickless candles using molten wax and lamp oil. Just throw a match in, and it's lit. We thought it would be fun to feed it. Lighter fluid. Vodka. Water. It started spitting and hissing, and we back away, but it calmed down. It did it a couple more times, but we weren't concerned. The last time it started, it didn't stop, and the fire roared straight up out of the cup. If the previous fires hadn't removed the ceiling and the second floor, it wouldn't have been able to pass through the rafters as it did.
The gay, black man who had set up the squat was highly pyrophobic. I guess he had burned his own house down as a child or something. He also knew the history of the house. He got hysterical when he saw it (he heard it first, lol) screaming, "Put it out! Put it out!" I remember thinking, "How the hell am I supposed to do that?" so, I blew on it like it was a birthday candle, and out it went.
11' or so high (we guessed at 10' ceilings and it went a bit past the rafters), and about 6" wide (it expanded once it was out of the cup) and all it took to kill it was a puff of wind.
Luckily it was semi easiy to do and my teeth are doing just fine.
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