I had a guy the other night, playing 6-max, who would open fold on any street. HEADS UP!
It was hilarious. Of course, he was the table coach. One time, I opened with KK on the button and he called in the BB. Flop comes AA4 and he just open folds for about the 10th time.
I "lol"ed him and he proceeded to call me a fucking retard, yada yada yada. He did it probably once every two orbits (minimum) for over an hour. It was the funniest thing I've seen in a while. He was tough to put on a hand.