Amazing! My daughter shared this video with me the other day and it's also on Daily Motion and the Santa Cruz bike's web page. He's riding a Bronson.
I'm not particularly scared of heights but this video made my stomach twinge a few times--especially on that tire-width goat track.
MacAskill was born with two wheels and grew up on one of those rocky Scottish Isles (Skye). He's "Hans Rey-Next Generation". Here's another great video showing his trials skills including the out-take crashes: Red Bull Imaginate http://dai.ly/x27do66
Danny said he had more fun at that Playboy Mansion: http://dai.ly/x23gxwx
The bunnies seemed pretty impressed and that is hard to do. Note: video rated PG-13 so if you're under-age, get your parent's permission before viewing.
Sorry, above video is behind scenes--here's final production(same obstacles and rating): http://youtu.be/7KPU7DWRe1Y