This hand came up last night at the Showboat in AC. The play is pretty regular casino 1/2 NLHE: standard preflop raises of $10-$15, five or six limpers to flops, etc. At this point the table had been playing about two hours. I was hovering near my original $120 then I won a pot from the player in question when I called $10 preflop, checked on the flop, check-called $10 on the turn, and check-called $50 on the river with red 88 on a K-7-6-10-2 board. He had AQ and cursed me as I stacked the chips.
Half an hour later the stacks were app. $220 for me and $375 for him. I get dealt


UTG+1 and raise to $10. He flat calls next to me and the big blind calls also. $31 in the pot.
Flop



. Check, I check to check raise, check.
Turn

. Check, I bet $15, he calls, big blind folds. $61 in the pot.
River

. I check, he snap-shoves allin. WTD?