Just remembered this cringe-fest:
Early days of Borgata, downstairs poker room. HUGE 1-2 pot. I shove on a favorable turn which includes a pair and a flush draw; villain tanks. I'm standing, like a dork who watched too much poker on TV. Dealer deals river before villain calls--it completes my flush but villain speaks up and river gets redealt. Villain insta calls expecting the flush not to hit twice in a row.
River pairs board and I yell F$%& and toss my cards down. They catch the air and
hit the dealer in the face before they land face up on the table.
The dealer looks me dead in the eye with that "you're an idiot" face and goes "chop."
I didn't lose the hand. I felt like a moron, apologized, and tipped the dealer $10, and left. That cringe feeling stuck with me ever since. I've never lost my cool at poker since that day.