Caterpillar

Caterpillar (キャタピラ) is a 1988 short experimental film by Japanese underground filmmaker Shozin Fukui. Fukui made the film at around the same time as when he was working as a crew member for Shinya Tsukamoto's Tetsuo: The Iron Man. Both films utilize similar filmmaking techniques such as hyperactive, handheld camerawork and stop-motion photography.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.