11. Sick: The Life And Death Of Bob Flanagan, Supermasochist
While narrative fiction films dominate this list, it wouldn't be complete without Sick: The Life And Death Of Bob Flanagan, Supermasochist. Few documentaries have provided such an insight into not only the world of BDSM but also the unique performance artist who forms the subject of the film. Bob Flanagan's perfomance art - along with his writing and poetry - is informed by his suffering from cystic fibrosis, his BDSM shows pushing the envelope of pain and artistic expression. If ever you want to see the correct way to hammer a nail through your penis, this is the documentary you need to see. For most of us, it's a unique insight into a world far removed from the one we're familiar with.