The Big Mouth

A fisherman, Gerald Clamson (Jerry Lewis), crosses paths with a diamond-smuggling gangster, Syd Valentine (also played by Jerry Lewis), who is his doppelgänger. Syd hands Gerald a map, leading him to a resort hotel where he meets a special girl, Suzie Cartwright (Susan Bay Nimoy). As Gerald navigates a series of misadventures to find the hidden diamonds, he disguises himself as a character similar to Professor Julius Kelp, while courting Suzie and evading the hotel staff and gangsters. The film culminates in a chaotic chase through Sea World San Diego.