Not the First Time(1976)

"This film is composed of different and relatively commonplace subjects, but each image is a super-imposition ('double exposure') of two similar shots of the same subject, almost in the same position. The effect is amazing: one's gaze at the image becomes a double gaze, as the two images were made at different times and with slightly different framing. The viewer is engaged in a process of double-vision that returns him to image and subject in a manner more complex, more self-aware, and more temporal than the way most of us view photographs." - Fred Camper