It's not great by any means, but it's a pretty good movie that didn't leave me filled with regret for investing time in it.

If the ambition is to provide two hours of instantly forgettable, popcorn-munching escapism, it succeeds.

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

If you like to be scared, if you like to laugh, and if you like to learn a thing or two at the movies, this absolutely cannot be missed.