Forty-five years ago, when actors showed up on the set of Warum Läuft Herr R. Amok?, co-directors Rainer Werner Fassbinder and Michael Fengler didn’t greet them with a script. Instead, they handed them an outline: a broad-stroke guide to the film’s scenes, but no instructions for what to say or how to behave. The result is one of cinema’s greatest exercises in tedium: 88 minutes of improvised and excruciatingly mundane conversation about financial problems, Christmas presents, television programmes and the minutiae of Herr R.’s job as a draftsman at an architectural firm. Director Susanne Kennedy's adaptation of the film, invited to this year's Theatertreffen, uses starkly formalized movement, creepy silicone masks and vocal playback, with the actors lip-syncing to precorded lines.