not dumbest thing I did, but happened when I was in the car.
Just left a formal dance while in H.S., and was sitting in the back of a Mercedes Jeep w/ my chick. The guy driving it was from some Arab country, and had ton o' $$ and was very drunk. The jeep had those criss cross seat belts in it, and while we were cruising down the highway towards an afterparty, I asked the guy why the seatbelts were the crisscross type.
They guy said "here, I'll show you", veered over to the outside lane, onto the sholder of the highway. On this particular stretch of the road there was a fairly steep grade downslope just past the sholder, and the IDIOT took the jeep off the sholder, onto the hill, and FLIPPED the steering wheel causing the jeep to flip over, and over, and over.
It came to a stop (upside down) and we all crawled out of it. The driver was laughing, saying something about how "safe" these Mercedes jeeps were, when I crawled over to him, straddled 'em, and proceeded to punch him over, and over, and over. Beat the fugger into unconciousness.
Idiot. NEVER put my chick into that kinda danger. At least, if you do, expect the arse whooping.
Sad part was he had another jeep in like a week.