A child in Brazil died after drinking Diet Coke and eating Mentos.
This rumor originates from a video clip that circulated on the internet in 2006, which demonstrated the spectacular result of dropping a Mentos candy into a bottle of Diet Coke. The mixture of carbon dioxide from the bubbly soda interacts with the porous surface of the candy, causing a hyper-carbonated geyser of Diet Coke foam to launch high into the air.
Despite this outcome, amateur daredevils the world over were no doubt disappointed when they drank Diet Coke and chewed Mentos candies, and absolutely nothing happened. This is because the mere act of chewing a Mentos candy destroys its porous surface, a necessary component in the formation of the carbon dioxide bubbles. Oh well. Perhaps the Coca-Cola website said it best when they said, “We strongly advise consumers to treat with skepticism unauthorized or untraceable myths and rumors which they find on the Internet, since they often, as in this case, turn out to be entirely false.”
SOURCE: Products And Packaging Myths & Rumors | thecoca-colacompany.com