A/B shows a seventeen floors passage down a narrow staircase, followed by an ascent up the same stairs. The staircase depicted is an isolated space, illuminated only by artificial light and with fireproof steel doors on every other landing. An emergency exit empty of personal belongings, the setting for the video does not so much indicate a place as it does a mere form. A form which, at the same time as providing the film’s subject, outlines its choreography.