This one’s called “The Domino Effect“, because it uses inter-connected Coke bottles that start each other, in series:

http://video.google.com/videoplay?docid=-274981837129821058

And, for good measure, here’s their original video, which I’m sure you’ve already seen:

http://video.google.com/videoplay?docid=2755541280271963544

Their videos are by far the best Diet Coke + Mentos experiments. Not only are their videos coreographed and set to music, but the two dudes do a decent job acting in them as well. For more of their videos, visit their site, EepyBird.