[chillrob]

I would probably have reraised preflop, but as played I think a raise in order, if you can do it quickly and confidently. This has got to be a major scarecard for an overpair as it completes a flush draw and a one card straight draw for any 7. Unless you know his hatred for you leads him to call even when he thinks he shouldn't, I think a bluff will work often enough against the typical player to make a play here. I think the bet without maybe even looking the last card is more likely sign of trying to show confidence from a player who is really not confident he will still be ahead after the river.

Rob