Coca-Cola marketing was slow, if not reluctant, to embrace the idea that a viral effect could run with such a phenomena. But the marketers of Mentos had no such qualms. They quickly invited two guys (Grobe and Stephen Voltz) from Eepybird.com — a website devoted to "Entertainment for curious mind" — to make fountains with Mentos-Diet Coke, near the company's North American headquarters in Erlanger.
In few months, a dozen of backyard experiments became an international cultural phenomenon. Look at what happens when you combine 200 liters of Diet Coke and over 500 Mentos mints! Grobe and Stephen Voltz are the guys behind this famous video.
But, it's not the world record. A Guinness World Record of 2,865 simultaneous geysers was set on October 17, 2010, in an event organized by Perfetti Van Melle (Philippines) at the SM Mall of Asia Complex, in Manila, Philippines.