Hmm, yeah in retrospect that's what I should have done. Instead I just checked the turn, he bet $1, and I smooth called. River came the ace of spades, and I went all-in (making it look like a bluff). He called with aces up (had Ac5c) and I got paid off anyhow, but I should've collected the money on fourth street while he was still drawing. It was lucky for me that a card that helped him hit on the river.