The General (1926)

Directed by Buster Keaton and Clyde Bruckman

During America’s Civil War, Union spies steal engineer Johnny Gray's beloved locomotive, 'The General'—with Johnnie's lady love aboard an attached boxcar—and he single-handedly must do all in his power to both get The General back and to rescue Annabelle.

My favourite Buster Keaton. Couldn't stop laughing when his girlfriend was feeding wood into the furnace and notices a hole in one of the planks… and then sweeps up a few minutes later.