Simon gives Mark a severe scalp burn
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Mark appears as the injured party in Simon's video, falling asleep with his bald head under a desk lamp, while trying to put a ship in a bottle. By the time Simon appears in the room to wake him up, he has apparently experienced a traumatic burn to his scalp. It's unclear how the injury was created, but it appears to have involved the use of some kind of sliced meat. Simon earns first place for his realistic injury.
(Written by Karl Craven)