Jack Cayman is a fictional character in the Sega game Madworld. Jack was a former ex marine and presumed dead but returns for the game show known as deathwatch, which was a show where people would be forced to kill each other for prizes while being broadcast on TV. Jack returns to the island where it is taking place and has a metallic hand with a chainsaw on top that can retract. He returns in the 360 game Anarchy Reigns. He is voiced by Steven Blum, who did the voice for the host of the anime section of Cartoon Network called Toonami.