Jack Blood was a fictional mass murderer and the protagonist of a Saturday morning children's animated television show in the early 21st century. He had a thin body with a Jack O' Lantern head, wore a black undertaker's suit and brandished a butcher knife in each hand. He was extremely popular. Sociologists wrote books about his universal appeal. Patrick O'Hara was a fan of the show. (PROSE: Cat's Cradle: Warhead)