Dummy Ache is a 1936 American short comedy film directed by Leslie Goodwins.
Edgar is suspicious about his wife's behaviour and soon afterwards follows to spy on Florence with the help of a friendly cab driver.
The play itself is about a clandestine affair,with Florence appearing as one of the lovers involved, with the man being shot dead, though a dummy replaces the actor in the scene as it is thrown down onto the ground.
Edgar misconstrues this as a real life affair and murder involving Florence while seeing it through a window, and vows to help his wife "to the bitter end", locking her in a large cupboard.
After various scrapes with several cops and local townspeople who think he is a murderer and capture him, Florence eventually catches up with Edgar to explain the full story to him, the cops and townspeople, revealing it was a prop dummy used in a rehearsal for a play.