This video is super human. The sad part is that Martyn Ashton has since suffered a severe spinal injury from a fall while doing a stunt. It makes me wonder about the motivation to do these tricks. The risk seems so very high. Would people do this kind of thing just for the fun of it if we weren't all watching them on youtube? Is the intrinsic drive enough to push people to this kind of risk? Or is it a byproduct of the human quest for fame? Probably both.

Meanwhile, this video is most definitely worth a watch just for the pure athleticism of the riders.