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Grant Imahara was a television personality and engineer who was best known for his work on the MythBusters and BattleBots TV shows. He also designed a robot named Geoff Peterson that appeared as a sidekick on the late night talk show Late Night with Conan O'Brien. Geoff Peterson was a wisecracking robot with a sarcastic personality who often made jokes at Conan O'Brien's expense.