Part of the BFI’s intriguing “A History Of The Avant-Garde” series, this is 66 minutes of decaying, nitrate-film archive footage, an artful collage in which figures deteriorate as we watch. Obviously, it’s heavily symbolic: nuns, children, boxers go about their endeavours unaware (or are they?) of the oblivion that looms. The dissonant score’s a drag, but this is nothing if not haunting.