I let him strain for a couple of seconds. Then like taking candy from a baby, I flipped his arm over and cracked his knuckles on the top of the table. It was strictly no contest and he knew it. But he had to try again. Same results.

Chapter 5, The Spoiled Brat, p. 98 (Arm wrestling Robert Kennedy, February 19, 1957, Chevy Chase, Maryland) - Hoffa The Real Story (1975)