Annie Duke goes from 15,000 to 20,000 with aces in Omaha - she made a flush. She shows the two aces to her opponent, but not the other two. The misinformed dealer lets this stand and mucks the hand. The other player calls the floor over under Duke's protest, who corrects the dealer - the opponent had the right to see the other two cards upon request.
Duke: "OK, I won't give you any more information ever again." She laughs.