At the top of the screen near the end of the final fight while Serial Killer is beating on Mendeleev, a set of legs can be seen running about. The culprit was Jonathan Ravis, who was not expecting the camera to turn about, and tried desperately to run out of shot. This is not the first time he popped into a scene either. When Robby and Serial were walking alongside Ms. Killer's house, Jon's wig can be seen popping out into view from behind a tree.