Seth points to some great video clips of the Wil Wheaton vs. Barney fight. He also points out that the idea has a long history.
Seth comments: “I skinned my knee in a pre-benefit light-saber duel with John Gilmore. One thing I did not expect to do when I moved out to California was skin my knee fighting John Gilmore. But he’s rather dextrous, and I could only get away by doing a full-body roll beneath a chain. Evildoers, beware!”