There was a lot of site showing that picture about how to prank you friends by adding a mentos not just only in coke but with ice. But, they just showed the picture. And I thought it is such a great improv. But, this guy show that it is not. Plus, this guy show much more improv. You can rub the mentos’s surface, dry it, add some salt. Steve sprangler is a great guy. Checkout this video. He improv the coke and mentos. And checkout his blog also. He even sell a Mentos Geyser Tube.