What to do with this AA against a big turn bet?

[jfletcher]

By the way, this was a $1.5K buyin at the WSOP.

Seems to me that decreases the chance that villain is betting a weak, one pair, hand here. He doesn't want to bust early and his bet looks like it wants a call.

I would also think that if he did have a semi-bluff type hand (like 75, flopped oesd, picked up a pair on the turn), he'd want to push the turn to maximize his folding equity.