[belloc]

My first thought in situations like this (flop call, turn bet on apparent blank) is that he either flopped a set or hit one on the turn, or that he made two pair on the turn.

The preflop coldcall makes me think of 77-JJ, but it's still weird. Maybe it's something toward the lower end of that (77-ish), or maybe an AXs and he really wanted to play the hand, but wanted to play it more multiway, and he called hoping the blinds would get excited about the big pot and call. I see this more in live play than online, but it's at least possible.

What exactly was the turn card? Is it possible that he was playing AXs, and made aces up on the turn? Or made a set on the turn?