I have had/seen a few good ones when I was helping out doing fireworks shows in HI. Scariest one for me was a 10" motor did not go off and we always had a lit flare to drop down the tubes. Well while dropping the flare the dam thing went off and jammed in the tube because of the flare. Could not jump into the ocean fast enough. Scared the hell out of me. Was like a incoming 155. The tube turned into shrapnel and started some of the next in the display to start going off. Prob life 4 or five right there.