Drives me nuts probably because at lower limits this happens all of the time. Just played a hand with JJ dealt. Raised 5xBB preflop. Three callers. Flop comes 10 7 4 all suits. I bet 2/3 the pot trying to drive out (now 15xBB) and still get two callers. Turn comes with a Q and they check. I Bet another 8xBB. Both call. River comes K. Now one of them bets 10xBB. I assume one has hit either a queen or a king at this point and fold. Show down shows they both had a pair of FOURS at the flop. One hit a king for two pair on the river, the other still had a PAIR OF FOURS. The guy called to showdown with nothing.

Makes me mad I had to invest so much money into a pot that should have been laid down after the flop by both these chuckleheads and then have to lay down my own hand. Good laydown though I guess.

Just took one of them while I was writing this for 20xBB when he called all in with pocket J's and I had pocket K's. Revenge is sweet.

But still, I will never understand this mentality. I will be happy to take their money in the long run however.