Make sure you got at least an hour of free time to admire his work before you head over to his sketchbook gallery or else you'll be late for whatever you've got going on after that...
Make sure you also check out the final animation.
Alexi Shulgin has the answer to this question...
In case you didn't know, Mark Pilgrim seems to have decided to delete his internet presence a few weeks ago. His awesome "Dive into HTML5" reference work has been salvaged by Mislav Marohnić and is back online as well as available for download in PDF.
And really sweet minimalist music to boot. Love it.
If this works as well as it looks like in the video, forget about the iPad, iPhone 5, etc... THIS is the greatest invention since sliced bread...