Sherlock Jr. (1924)

The sheik: We are lost! He is sending for the world's greatest detective - Sherlock Jr.!

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Projectionist: [as Sherlock Jr., riding on the handlebars of a motorcycle, unaware the driver fell off] Be careful or one of us will get hurt.

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Theatre Manager: Say Mr. Detective, before you clean up any mysteries, clean up this theater!

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Following his "entrance" into the "movie within a movie," the scenery changes around Buster Keaton very quickly, as if the movie is changing scenes with quick edits. (He suddenly finds himself on a crowded city street, in the jungle confronted by lions, on a rock in the middle of the ocean, etc.) Keaton later recalled that his cameraman, Byron Houck, had used surveying instruments to position him and the camera at the exact correct distances and positions to give the illusion of continuity as the scenes changed.
Many filmographies credit Roscoe 'Fatty' Arbuckle as co-director of this film. Whether this is true or not is unclear. Buster Keaton did originally hope to have Arbuckle work as his co-director, but claims Arbuckle was still too depressed over the scandal that had nearly ended his career two years earlier and had become difficult to work with. Then Keaton went ahead as the sole director of the film. Doris Deane, Arbuckle's second wife, later claimed Arbuckle directed the entire film. Historians disagree as to how much Arbuckle may have directed - which varies from none to as much as half.
According to the book Buster is reading, the seven rules for being a detective are: 1. Search Everybody. 2. Look for Clue. 3. Examine all windows. 4. Search for finger prints. 5. Shadow your man closely. 6. Send for the police. 7. Keep cool. Buster actually only employs rules #1 and #5 in the movie.
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