Yep, this video has been a huge internet hit.
I was doing a bit of reading on Danny MacAskill, he's from a little island off the west coast of Scotland called Skye. I've been there, and I can tell you he probably had nothing else to do all day!
All you can do is go camping & fishing (which I did), or ride plenty of really cool natural terrain to launch your mountain bike off (which he obviously did).