Lorenzo Waterman, better known as The Pumpkin Rabbit, is one of the main antagonists of the 2 non-canonical Halloween specials The Mysterious House and The Return of the Pumpkin Rabbit. He originally debuted in Night Of The Living Robot as a character known as "Jack-O-Bon." Lorenzo is a monstrous and sadistic serial killer who murders children on Halloween night annually. He is a resident of the titular "Mysterious House" along with his wife, Rachel Waterman.