This was a live hand in a northern California cardroom at 1-2-2 NL. For those unfamiliar with the 3 blind structure, BTN posts 1, SB and BB both post 2, and the bring-in is 4. 9-handed.
A little background on villain. I had been at the table with him for about an hour, and I had already seen him make a $100 all-in call with A9s preflop, make a hero call on the river with bottom pair (he held T2o that hand), and generally bet whenever he sensed the slightest weakness. A few hands before the one in question, though, he had folded JJ face-up to a four-bet from me (I had AA that hand) preflop. So, I think he may have been steaming a little from that.
Now, the hand in question: I have about $230 in the CO and villain has about $250 UTG.
Preflop: Hero has 5
4
Villain opens for $4 before getting cards. MP and HJ call. Hero calls. BTN raises to $15. UTG (Villain) calls, HJ folds. Hero calls. Pot: $58
Flop: 5
5
6
Villain checks. Hero bets $30. BTN folds. UTG (Villain) calls. Pot: $118
Turn: 5
5
6
8
Villain checks. Hero bets $50. Villain raises all-in. Hero???