Hamateur Night (1939)

Continuity mistake: When the dog in the audience has his feet crushed by the hippopotamus sitting down on his chair, you can see that there is an empty chair next to the dog, but in the next shot the chair has disappeared.

Continuity mistake: When the Master of Ceremonies appears on stage at the start of the show, a spotlight shines on him and you can see his shadow on the curtain behind him. But in the next shot, there is no shadow.

Continuity mistake: When the sword act performer waits for his subject to appear from the audience, there is a shadow behind him on the curtain. In the next shot, there is no shadow.