That I've done... hmmm... wow, can't think of anything... I'll ask DH, whatta ya wanna bet he knows?
Actually, I can't think of any dumb ones that DH's done either.
I do know OTHERS have plowed a trailer hitch into my plastic bumper and driven off.
Pulled out of their drive and left a huge dent in my truck fender.
Rear ended me while I was stopped at a stop sign.
Then there was the 90yr woman who plowed through the red light, looking behind her so she could make a lane change in said intersection, and T-boned us.
My MIL once closed the garage door on the trunk of her car...
which I don't think is any worse than FIL backing into a concrete post but he seems to disagree.