The Big Mouth is a 1967 American comedy film produced, directed, co-written, and starring Jerry Lewis.

Their leader Thor ensures Syd's demise by firing a torpedo from his yacht that goes ashore, blowing a crater into the beach.

The one man Gerald meets who believes him, and identifies himself as an FBI special agent, turns out to be an escapee from an insane asylum.

The movie climaxes in a chase through Sea World San Diego, where Gerald is pursued by Thor's mob, a rival group of gangsters who had made a deal with Syd to buy his diamonds, and a group of Chinese who smuggle the diamonds disguised as plastic pearls.

The Big Mouth was filmed from December 5, 1966 to February 28, 1967 in the newly built Hilton San Diego hotel at Mission Bay and marked the film debut of Charlie Callas after he met Lewis on a chat show[3] as well as a cameo by Colonel Harland Sanders.