Blending excellent reporting and strong storytelling, this is a disturbing film truly stranger than fiction

This is a must-see and one of the best documentaries - and films - of this year.

I think this is a new genre that they're all sort of working their way through it and haven't got all the kinks worked out yet but it's a genre that works for me.

One of the film's great tricks is that, for a time, you think it will go down a rabbit hole of unrealistic glorification.