The Cussing Channel has produced a Dark Knight Joker supercut, featuring all the on-camera Heath Ledger scenes. It rather stopped me in my tracks -- Ledger really put in an astounding performance, something that is underlined three times in red by ten straight minutes of Ledger doing his thing.
Rules: Just The Joker, just the on-camera dialogue. Now, there are many shots in this film over the Joker's shoulder, with the focus on the character he's talking to... those lines didn't make it... only the clips where the Joker is the focus of the shot (otherwise this becomes a 30-minute affair).
The Dark Knight - Just The Joker (Thanks, Phillip!)