The Rock accidentally knocked out Michael Clarke Duncan while filming their first fight scene together in The Scorpion King. Duncan, a trained actor but not a fighter, leaned forward instead of backward during an elbow sequence and took a direct hit to the jaw. After accidentally punching an older stuntman on the same film, The Rock felt so guilty he bought the man a custom Rolex—and once the story got out, he noticed other stuntmen mysteriously "leaning in closer" during fight scenes.