The Big Mouth

The Big Mouth is a 1967 American comedy film produced, directed, co-written, and starring Jerry Lewis. It was filmed in San Diego and features Frank De Vol as an onscreen narrator.


Gerald Clamson is a bank examiner who loves fishing on his annual two-week holiday. Unfortunately, one day at the ocean he reels in Syd Valentine, an injured gangster in a scuba diving suit. 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, locate Syd and gun him down. Their leader Thor ensures Syd's demise by firing a torpedo from his yacht that goes ashore, blowing a crater into the beach.