Patrick Bokanowski’s experimental animated feature takes as its framework a man ascending an apparently endless flight of stairs toward a zone of light. On each landing, he encounters various characters obsessed with tiny tasks—a man taking a bath, a maid filling a water jug, a group of librarians who jerk through their rounds like robots. The technique combines live-action photography, optical manipulation, and a treatment of the film stock that gives the image the line of an antique engraving. On the same program, Rehearsals for Extinct Anatomies, the latest puppet-animation film by the Brothers Quay. Presented by the Experimental Film Coalition.