This smart, amiable documentary is about corn: how it's grown, subsidized, processed, and how it sneaks its way into virtually every food on grocery-store shelves. The reporting is borrowed (with permission) from Michael Pollan's The Omnivore's Dilemma, but the filmmakers can't be called lazy. They track down former agriculture secretary Earl Butz, allowing him to defend the "cheap food" revolution he led in the 1970s, and even grow an acre of corn themselves. You are what you eat, know thyself, etc.: Don't miss King Corn. (Grand Illusion, 1403 NE 50th St, 523-3935. 7 and 9 pm, $6–$8.)