There’s a gag in The Boat in which the hero launches his boat, and it immediately sinks. It seems simple enough, but Buster Keaton actually went through several attempts and engineering adjustments before getting the shot right. If it had sank any other way, it wouldn’t have been funny, he said. That level of commitment to a few seconds of a movie embodies the ethos of the best silent comedy: It may seem on the surface to be pure silliness, but a great deal of thought, strategy and effort went into maximizing the audience’s laughter. The Boat is characteristically loaded with both great humor and great physical comedy—including Keaton trying to stay oriented as his boat is battered around in circles.