20-40: Middle pair, small pot.

[Yerma]

This is silly, turn is 9c and you check the turn...it's not like some flush got there and he's scared of it...a "predictable local" will bet this turn with an Ace if you check to him. He can't be scared of your c/r here. Ergo, he cannot have the Ace or much of a hand. Did you put him on exactly 77 on the river? You didn't tell us that he *sucked* on top of everything else.

Anyways, I think you're played it right. But don't tell us you thought he had a suited Ace! That is crazy!