He was sitting in his office rewatching the human centipede which was his inspiration for making a real life human centipede and after rewatching it he starting sketching the designs dr heiter had in the movie for the human centipede, he then sees you and your friend walking by and he silently got up from his seat and took a crowbar and walked behind you and your friend until it was time to strike and then he would recreate the human centipede with 12 people