Fritz Grobe and Stephen Voltz, the Eepybird guys who turned the Mentos and Diet Coke experiment into art are jumping from the Internet to the mainstream media.

They appeared on David Letterman last Thursday night and on the “Today Show” Friday morning. They demonstrated their version of the Bellagio Fountains done with Mentos and Diet Coke on both shows.

Their video went viral after they posted a 3-minute video on their website using more than 500 Mentos and more than 100 two-liter plastic bottles of Diet Coke in June.