Q. What happens when you drop a 4 Mentos mints into a 2-liter bottle of Diet Coke?
A. A mess.
Q. What happens when 2 weird scientist-looking guys with lab coats, an affinity for the fountains at the Bellagio in Las Vegas, and waaaaaaaaay too much time on their hands drop 500 Mentos into 200 liters of Diet Coke?
A: This video: