Seven years ago I interviewed Leo Houlding about his adventures. During our conversation, Leo told me that he was experimenting with a flying suit. I thought he was winding me up. He wasn't.

Today, wingsuit flying is at the cutting edge of extreme pursuits. One of the sport's leading proponents, Ueli Gegenschatz, took to the stage at TED earlier this year to explain the evolution of this breathtaking form of travel, and why he does it. Ueli's honest explanation of his motives is one thing, but it seems that nothing could prepare the audience for the film of his jaw-dropping aerial projects. Stay tuned for the hilarious Q & A at the tail end of this video of his presentation.