Guinness "Pint of Dominoes"
By the guy who did the Bravia "Super balls in SF" Ad. There's a youtube floating around as well, but it's lower rez, and without the background text.
That is a pint of awesome!
The sad things about these ads are that the stunts are pretty great works of art. What's going to happen in another couple of years we're going to be bored to death with his creative vision and be turned off while we wonder what are they trying to sell me now?
On the other hand he'll be driving by us waving his middle finger out of the window of his Ferrari. Most visionary performance artists can't do that...