Danny MacAskill of Inspired Bicycles... got skill

The thing that made my jaw really drop wasn't the riding along the top of the fence, it was cranking across a park towards a tree, managing to go about twelve feet up the trunk, and coming off backwards on to his rear wheel, perfectly. And then doing it again, but with a backflip. How on earth do you practice that? Bouldering mats?

I think the guy just has massive gonads.