You Ought to Be in Pictures (1940)

Continuity mistake: When Porky is searching for his contract in the waste-paper basket in Leon Schlesinger's office, he leaves some paper on the floor. But when Leon tells him to go back to work, we cut to Porky and the paper has gone.

Trivia: Various members of the Warner Brothers animation staff appear in the short. Michael Maltese plays a studio cop, Gerry Chiniquy plays a director and Henry Binder appears as a stagehand who throws Porky off a soundstage after his sneezing interrupts the shooting of a ballet film. But Mel Blanc dubbed all their voices, as the footage was shot silent.