Buster Keaton’s run-away motorcycle ride in Sherlock Jr. is one that couldn’t, and shouldn’t, be repeated. The scene is dangerous in about 20 different ways, and impressive in about 20 different ways, too. Keaton, who famously did his own stunts, learned how to ride a motorcycle on the handlebars, weaving it through traffic, a stag party, and dynamite in a breathtaking three minutes of fastidious choreography and intensifying stunt work. The last sequence, where Keaton narrowly misses an oncoming train while crossing train tracks, was shot backwards, and composite shots were used to achieve the effect of the motorbike riding over two trucks filling in for part of a missing bridge. Those clever tricks made some of the stunts safer, but it’s still incredible that Keaton really did it all—riding a motorcycle through a series of ridiculously escalating scenarios until he realizes no one is driving, shoots the camera a disapproving look, like we should’ve warned him, and crashes through a house and straight into his foe. [Caitlin PenzeyMoog]