Go to the scene Jack Napier now The Joker (Jack Nicholson) goes to kill Carl Grissum his boss for revenge on attepting to have him killed. The first few times shooting the scene his white makeup on the neck rubbed on the purple collar of his shirt. The makeup artist noticed the makeup, and rather than wipe the white makeup off of the collar, he put purple makeup OVER the white makeup on the collar covering the mistake. Little did he know he was causing a slip-up! The purple coverup rubbed on his neck, and when he comes out of the darkness and says "You can call me Joker", you can see a HUGE purple smudge on his neck. When i noticed this it completely ruined the scene for me!