I like the flat call on the river. There must be something like $45 in the pot when that $15 bet comes to you.
I just lost my stack on an AA to KT that caught his backdoor straight draw, him just calling my pot-sized bets the whole way through with one overcard. Oh, and he also had a backdoor fush draw (with the J on a two flush flop).
He went in my buddy list, I hope I can get my money back sometime on the same play.