Smile, Darn Ya, Smile! (1931) - Public Domain Cartoons

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Plot
Foxy is a trolley engineer whose problems include a fat lady hippo who can't fit into the trolley and a set of wheels that detach from the trolley car when Foxy gets the trolley moving. Foxy picks up Roxy and gives her a ride, but along the way, the car is blocked by a cow wearing a dress, and glasses, and who won't get off the track. A group of nearby hobos sing the title song while Foxy tries to move the cow; he finally runs the car underneath the cow and goes on his way.

The trolley then goes down a hill and runs out of control; Foxy tries to stop it, but the brakes don't work. Finally, the trolley runs off of a cliff, throwing Foxy right into the camera... and then he falls from bed, waking up from what has turned out to be just a nightmare. The radio by his bed is playing the title song, and the annoyed Foxy smashes the radio with a bedpost upon hearing it.