Great question, one I asked myself at the time. With 2000 in the pot and 600 to go I figured I was getting almost 4 to 1 to call with a pretty strong hand.

Once the flop hit I went through the possiblities and just acted on my gut feelings. The bet of 500 after raising 600 pre-flop just seemed like a trap. I had no real information, but had seen him play a couple of hands and listened to some of his conversation that led me to believe he was a fairly good player who was trying to extract money out of me.