Springtime for Thomas (1946)

Continuity mistake: When Butch is chasing Tom, Tom puts a flowerpot on a swing which crashes into Butch and it leaves earth on the floor. But when Butch uses a guitar to spank Tom when he comes down on the swing, the earth has completely disappeared.

Trivia: When Jerry finds Butch in the alley, we hear Butch humming a song. The song he is humming is "Over the Rainbow" from the film "The Wizard of Oz."