Daffy Duck in Hollywood (1938)

Continuity mistake: When Von Hamburger shows the producer the completed reel, it has a green spool and he puts it by the side of the producer's desk. Daffy then replaces it with his own film and you can see that the spool is light blue. The spool then becomes green again in the next shot.

Continuity mistake: Von Hamburger has no buttons on his shirt from the start of the cartoon, but when he is watching his completed film and taking a deep breath, buttons have suddenly appeared.

Continuity mistake: When Von Hamburger and the producer sit at the movie theatre to watch the completed film, they sit at the back and you can see there is an empty seat between them. When the film begins, we see the back of the two and they are sitting side by side.

Von Hamburger: This should be a close-up, am I r-r-r-r-r-right, boys?
Assistant Directors: Yes, sir, yes, sir, yes, sir, yes, sir.

Von Hamburger: I'll take turrrrkey with all the trrrrrrrrrrrrrrrimmings.