This is what I learned:
- The geyser is a result of lots of bubbles being released.
- The greatest reaction comes from Diet Coke and Mentos.
- Bubbles cling to solid objects like Mentos and the side of the bottle this causes a little fizzing.
- The potassium, benzout, aspartame, and CO2 in the coke reacting to gum arabic and gelatin cause an explosive amount of foam being released.