Errol Flynn and Basil Rathbone go at it in one of Hollywood’s greatest sword-fighting scenes (from the 1938 movie, Robin Hood). Interestingly, Basil Rathbone was, in fact, an accomplished swordsman, whereas Flynn was a simple hacker and slasher. After one-too-many near misses, Rathbone reportedly told the director that if Flynn didn’t acquire some technique, he was going to run him through.
Bonus video! Basil Rathbone takes on Tyrone Power in The Mark of Zorro (the audio is a little out of kilter; either that, or the actors had been inhaling helium before the scene was filmed).
Also: Robert Avrech at Seraphic Secret has an interesting recommendation.