A few years ago my friend was playing a pretty strong player, getting the 8 ball from him for $250. They agreed to only play one set, because my friend had to leave in a little over an hour. My friend wins the set, takes the money, and asks the guy when he'd like to play again. The guy who lost got really angry and said that he wanted to play again right then and there. My friend said that he had to be somewhere at a certain time and he didn't have time, and since they had agreed to only play one set, the other guy would have to wait to play him some other time. The loser gets even more angry, telling my friend that he's got no gamble, and he calls my friend a nit. So my friend says to him, I'll tell you what, I'll flip you for another $250 then. The loser says ok, and my friend says 'heads I win, tails you lose', and the loser says ok. It lands tails, and says 'tails you lose', my friend takes the other $250 and leaves. The loser didn't realize that he had been scammed until the next day. Even when he saw my friend again, he was so humiliated that he couldn't even really get angry at him, and they became good friends to this day. When I heard that story I laughed my ass off for hours.