5-500 spread limit game at Talking Stick casino in Scottsdale (blinds 3-5). Effective stacks are roughly 1450 (max buy-in is $1500, he just re-bought). Villain is tilting after losing two big pots and has opened to $20 the past 8 hands in a row, showing down off-suit trash twice. He opens for $20 in the cutoff and I 3-bet $85 on the button with 3s3c. We see the flop heads up of 4s5c5h. He checks and I bet another $85, he calls. Turn is a Qh, he checks, I bet $125, he snap calls, which is unusual for him, he's usually been check-raising in his tilt either on the flop or turn. I sense a possible trap. River is the miracle 3h, he checks, I bet $$250, he raises the max to $750 leaving him with approx. $400. I call and take the pot when he shows 6-9 hearts. Did I chicken out on the river?