Sherlock Jr. (1924)
Buster's five reel masterpiece was set in in the environs of a local movie theater and then migrated to the insides of a fantasy about film while Buster's projectionist dreamed of possibilities beyond 1924: talkies, transubstantiation and magical motorbikes. His onscreen/onscreen detective solves an impossible crime with impossibilities while just onscreen his lost love does the real detective work he's unable to improvise.
Keaton films a 40 second continuous take of a refrigerated railroad escape hatched exit (trap door), then as the train takes off Buster walks opposite the train's direction, he remains centered, leaping between trains, until at the end he simply jumps onto a water chute's chain, grabs it in mid-air and takes it down to the ground, finally awashed in a deluge. He simply gets up and walks away from the camera as a hand-operated car slides into frame with two men, who are then drowned. The take is obviously a masterpiece inside one. Later, in the dream sequence, Buster is lured up a stairs and exits a trap door that's then locked. Then a wide shot from the ground, as Keaton appears above only as the villain slides into a redlight. Keaton comes to the roof's edge, and leaps on an upright railroad crossing gate, and rides it down, right into the villain's rear seat. A mimic of reality's railroad gag.
"Keaton showed us the impossible to show that it was impossible. Distinguishing between life on the screen and life in nature - and for all that, between screen life and stage life - Keaton defined the form as no analyst had before him had done, marking out its liberties and limitations precisely. But not as theory. He made the contradiction visible. Before Buster penetrates the screen in Sherlock, Jr., he must step onto the stage in front of it."
Walter Kerr The Silent Clowns Knopf 1975
Below images: to prove he's inside the film of his dreams, Keaton steps into the dressing mirror without commentary, then (not shown) later he jumps first into a dress he's suddenly wearing, then (illustrated) he leaps impossibly into his assistant. From Silent Clowns.
