It's an iconic moment in Enter The Dragon: after what might be the most lopsided fight in the history of kung fu, Bruce Lee, with an incredible, running side kick, knocks karate master Bob Wall flat on on his ass. They ran several takes of this, and Wall, a consummate professional, encouraged Bruce to make it look and feel as real as possible. On the sixth or seventh take, Bruce kicked Wall so hard that when he fell back, he broke an extra's arm. One can only imagine how Wall's torso felt for the next several days.