Cowboys are riding rocking horses. They are being chased by sheriffs.
The men are riding rocking horses and not real horses.
Why are the men riding rocking horses?
I ain't going back to timeout!
scene: a western description: Cowboys are riding rocking horses. They are being chased by sheriffs. uncanny: The men are riding rocking horses and not real horses. entities: Cowboy, Rocking_horse. caption: I ain't going back to timeout!
Because the robbers and cops are riding toy rocking horses instead of real horses, the caption jokes about why these child-like robbers might be being chased. Specifically --- if the cops catch the outlaws, they might send them to time-out instead of prison because they are riding toy horses instead of real horses.