The film makes a home in your brain and the only cure is to see it again.

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

The movie's not perfect, but it sticks the landing of its message. It was engaging - thrilling at times - and I personally thought it was a great time.

The film never slows down or bores, plunging from one harrowing sequence to the next.