Biggest pot you've ever made a bad fold in?

[marchron]

Before I decided to adhere to the wisdom of 2+2, I once held A/9 and got caught in a raising war between two other players when an ace spiked on the flop. I was too stupid to realize I had TOP FREAKIN' PAIR and mucked, figuring I had to be outkicked.

The winner showed K/Q for ace-king-queen high. Not only did that loss cost me about a 15 BB pot or so (I was playing $1/$2 because I thought "players would respect my raises"), it had to have cost me at least $100 more in tilt.