Slab waves are some of the most impressive and terrifying things you're likely to see in nature: waves the size of a forty foot apartment building crumbling onto a few centimetres of water and, below that, a hard ground of rock and reef.

Only a few daring souls would even consider taking a surfboard out onto one.

In the Drawing Room, Bentley Dean talks about his new documentary, Facing Monsters, which follows Kerby Brown as he tests himself against those wild conditions and turns surfing into an artform.