I have been playing with scanning negatives (positives in this case) that are split over two frames - as opposed to between frames. Then moving these "spliced" scans about into different sequences.
I have been doing it with shots that are linear in sequence - so down the same street or same place at different times. Or in this case, every few steps down the length of a city bus.
E-6 film goes pure black where not exposed which is included in the scan which is then usually cropped out at the area where the light fall off on the film plane starts. But Not here. ;-)
Style was inspired by a great shot on flickr where the photog shot 120 format film and exposed for 6x9, but advanced the film as if it was 6x4.5 - Giving one continuous overlapping story for the full length of the film.