Sherlock Jr. (1924) 720p

A movie theater projectionist dreams of becoming a detective and tries to win the affection of a girl, but his rival, the Sheik, frames him for stealing her father's watch, leading to his disgrace. In his dreams, he becomes the confident detective Sherlock Jr., solving the crime and saving the girl, but the reality is a bit different...

Fun facts:
In addition to being one of Keaton's most complicated films for special optical effects and in-camera tricks, it also has one of Keaton's most famous on-set accidents. In a scene where Keaton grabs a water spout while walking on a moving boxcar train, the water unexpectedly flooded down on Keaton much harder than anticipated, throwing him to the ground. The back of Keaton's neck slammed against a steel rail on the ground, breaking it, and causing him to black out.