What Happens When You Cover Your Body In Mentos And Jump In A Bathtub Full Of Coke Zero?

So what's going on here? Why does mentos + coke cause this reaction? When the candy’s porous surface, gelatin, and gum arabic combine with the potassium benzoate, aspartame, and carbonation in the soda, the CO2 gets released incredibly rapidly, producing a tremendous amount of foam. When forced to go through the bottle’s narrow opening, this creates a huge geyser.