Curtis Choy’s early free-wheeling experimental shorts are a portrait of a vital San Francisco arts scene and a blistering, tongue-in-cheek comic assault on all those powers that (still) need checking. In seven wildly contrasting episodes — including “Burros at Taco Bell” and “Hip-Shaking C-Town” — race, cultural politics and place are skewered with Choy’s mondo-humor, where revolutionaries take a bao break, and macho men get down. Appearances by Janice Mirikitani, Lane Nishikawa, Marc Hayashi and more.