The Big Mouth

Gerald Clamson (Jerry Lewis) is a bank examiner who loves fishing on his annual two week holiday. Unfortunately one day at the ocean he reels in an injured gangster in a scuba diving suit named Syd Valentine (also played by Lewis). Syd tells Gerald about diamonds he has stolen from the other gangsters and hands him a map. Gerald escapes as frogmen from a yacht machine gun the beach. They swim ashore and locate Syd where they machine gun him. Their leader Thor (Harold J. Stone) ensures Syd's demise by firing a torpedo from his yacht that goes ashore blowing a crater into the beach. As the police ignore Gerald's story, Gerald heads to the Hilton Inn in San Diego where Syd claimed the diamonds were hidden. There he meets Suzie Cartwright (Susan Bay), an airline stewardess.