The Great Buster: A Celebration: the title of Peter Bogdanovich’s documentary on Buster Keaton is nothing if not on-the-nose. The film has two different halves; the fist one is a rather conventional talking-heads doc, where Bogdanovich’s narration and a wealth of interviewees tell the story of Keaton, mostly in chronological order, with the expected shower of (deserved, of course) praise. Nothing there provides much insight into the genius comediant (but there certainly is a lot of misplaced self-congratulation from their part). The second half is a very well-curated selection of Keaton’s wonderful comedy, and that part alone is worth the price of admission. Buster Keaton was famous for two aspects. First, as the Great Stone Face, a bit of a misnomer, since he has a highly expressive top half of his face to go with the famously stoic bottom half. Second, for his rich, hair-raising stunts, generally both visually impressive and hilarious. Editor Bill Berg-Hillinger milks those clips for all they are worth, with a good musical selection to accompany them.