Mentos and Coca Cola

In much the same vein as the glowing microwaved grapes I posted about a few weeks ago, I recently found several pages dedicated to showing what happens when you combine Mentos with Coca Cola. I first saw this amazing photo on Flickr, uploaded by someone named Undrin. Intrigued, I went to Google and found this video (here's another, just for good measure). According to Undrin's comment, the Mentos cause the surface tension of the liquid to decrease, allowing all of the carbonation to be released at once. More specifically, I learned, it's the arabic gum that causes the surface tension to decrease. It's also what makes Mentos chewy. You can find an explanation here, and more discussion on Snopes.