"What I liked about the bus scene was that during their conversation, instead of doing a traditional shot-reverse-shot through the dialogue, the camera goes instead between a two-shot of them sitting next to each other on the bus and then, where there would otherwise have been the reverse-shot, cuts to their (mutual) view out the front windows of the bus. Because everyone does dialogue through shot-reverse-shot (for the obvious reasons), the fact that they shared this view (we're looking through both girls' eyes at once) and that they couldn't be divided into the two separate people you'd need for a shot-reverse-shot was my first
clue they were the same person. And then I really liked the montage because it's such a standard Hollywood technique-- the song over the various shots of two people being happy getting to know each other-- which ends either in total happiness or in the set-up for their first fight. But this montage went straight through the arch of the relationship so the viewer saw their growing animosity as part of that same process. "