Koyaanisqatsi ★★★★½

If you ever need to convince someone that music is a filmmaker's most valuable tool, show them Koyaanisqatsi. Here, Philip Glass' score accompanies vast and sweeping shots of both natural and man-made phenomena, managing to imbue both with feelings of wonder and dread. The film uses time-lapse footage, still images and propulsive aerial photography to portray a sense of man falling out of balance with nature.

It is cleverly edited to show the scope of the problems we are fumbling with, from urban decay to industrialisation, to the mass production of food. It uses repetition - both in images and in the minimalist score - as a thematic through-line.

It is profoundly unsettling and the knotty sensory overload it gives you takes you out of the world and unmakes your sense of things in the best way. This is a film to be experienced, rather than described. Go watch it, pronto!