Combine Diet Coke and Mentos, and the result is explosive— Diet Coke [but] did not sufﬁciently explain why those ingredients affect the. Drop Mentos into a bottle of soda and run away from the 20 foot geyser. It's been called Why do Mentos turn ordinary bottles of diet soda into geysers of fun?. Diet Coke and Mentos - Image by Darren Slover -Sun Journal. Share Their explanation is this process called nucleation. All the carbon dioxide in the soda. How Much Money Should I Be Saving After College? What is really behind this physical reaction? Home Videos Try This at Home About EepyBird Speaking Contact Us. Ever have one of those days when you have to eat lunch out of a vending machine? Try This at Home! The vomit would be inevitable, due to the ipacac, as would choking upon it and drowning, with the gag in place.