[damaniac]

Folding a winner only costs you 30BB if you would always win the pot by calling. In the actual hand, yes a bad call costs us 1BB and a bad fold costs us the pot. However, that is results-oriented thinking. We need to think of how often we are good when we call here in this type of situation (or better put, what the chances are of having the best hand). If that weren't so, you should always call in any pot bigger than 1BB if there is a chance your hand is best, since calling can only cost you 1BB but folding would cost you more. The % you are good is highly determinative of how big a mistake this is (along with the pot size).

Edit: I should say that if we are behind on an actual hand, that would be the result. I didnt't look/reread the hand in question before posting so I don't know if he won/lost. But even if you do lose this hand, folding is only a 30BB mistake if you would always be ahead. If the OP is considering folding, the odds are probably considerably lower.