What are you afraid of here? A set? Two pair? If he's a wild enough player to have 2 pair, I'm paying him off here. There's a possibility of a set, but I don't know how much I expect it's what he has. It's hard to put anyone in lower limits on a set. Anything else and you're way ahead. I wouldn't fold this.

I expect that he thought you were raising on a bluff since you raised preflop and then the flop came low. He can't think that it hit you, so he may be reraising with anything at all.

- Jeffrey