You Don't Know What You're Doin'!

The story involves the character Piggy, who picks up his girlfriend Fluffy and takes her to a theater where a hot jazz orchestra is playing.

Piggy mocks the trumpet soloist, then crashes the stage to play a corny chorus of the 1873 hit "Silver Threads Among the Gold" on the saxophone.

The dog drinks from a bottle of bootleg hootch (the film was made during alcohol Prohibition in the US) and belches in Piggy's face.

The musical soundtrack was done by the then-nationally famous Abe Lyman Orchestra (though on some prints mis-attributed to the Gus Arnheim band), which adds a happy energy throughout the cartoon.

Martin played not only music but also some rather bizarre effects on his horn (the techniques he used to produce some of his sounds continue to puzzle other trombonists).