[sykotic]

From the way it plays out, its almost certain he has an overpair.

So lets look at it from a mathematical view. Lets assume that any flush/two pair/trips will win this pot. You have a total of 15 outs. So you have approximately a 30% chance of making your hand on the next card, but only have 2 to 1 odds unless the other guy calls.

So it looks like a fold to me, unless you want to push him off the hand, which doesn't look so good here.