Both the editing and the soundtrack display the avant-garde art idea of a young film maker. However, this slightly conservative story clearly does not support such a strong desire for expression.
The mainly reason of current situation probably is that Leos Carax, the director of the film, didn't figure out how to expertly combine a commercial script with private style during that time. Therefore, though some independent parts is amazing and outstanding, the final result is somehow a bit out of control.
