I dunno... if there's more then a 50% chance that he's bluffing it's profitable to call there I think.

If he has a flush he checked it on TWO streets. If he had the top pair, he checked it TWICE. If he was that concerned about checking to try and get more money in the pot, why the massive auto-fold bet on the end?

A fishy play like that I think there's at least a 50% chance someone has been watching too much ESPN, and I may call. But I also would have bet out for information on the flop.