The skill involved in setting down multiple loop tracks in the small pockets of time before the song starts was an astonishing presentation of multitasking unmatched by most talented minds. Never mind the continuous turning on and off of these recordings, plus adding new recordings, in order to piece together the song with fullness that music played by an entire band has. How he remembered when to turn off and on which pedal is beyond my personal comprehension. Never mind that he did this WHILE he performed the song on guitar while singing.
You may well ask “why would I be interested in this film?”, and to this I say that we all need to learn about each other, and it’s about time misconceptions about those defined as disabled were dissolved.