Back for one night only—thanks to SIFF’s Tugg program, wherein audience members vote online for films they want to see on the big screen—is Matthew Lillard’s adaptation of an award-winning young adult novel about a suicidal fat kid in Seattle drawn into a friendship (and a punk band) with a troubled dropout. It’s terrific and laced throughout with richly humane moments that nail down big, well-known concepts—the push-and-pull of family love, the thrill of live music, the shittiness of loving a junkie (even platonically)—with affecting precision. (SIFF Cinema at the Uptown, 511 Queen Anne Ave N, www.siff.net, 7 pm, $10)