I can never figure out the psychology of people that push all in for so much more than the pot.

He is obviously afraid to play the hand post flop. If he had AA or KK, don't you think he'd just call the raise, and try to get more out of you on the flop?

Does he have AA, KK, or QQ, and afraid of having it busted post flop? Does he have 72o, hoping to just win the pot right there, because his hand can't take a flop?

What causes people to overbet so much preflop?

I was considering making a thread on this earlier, but this dovetails nicely with this hand right here. I simply can't get my mind around it.