That's the outbreak of carbon dioxide gas bubbles.
search for 'mythbusters coke and mentos' on Google. they have videos and stuff.
Mentos,vespecially if the soda is Coke or something with caffeine
put the mentos in when you want it to fizz....or you can try tape. put the mentos on the tape the stick it to the edge of the opening then throw it and itll fizz. make sure the mentos dosnt touch the coke before you throw it.
Just the water alone would do it, but there's also phosphoric acid in Coke which makes it dissolve the coating faster.
What is the acid that makes Coke and Pepsi fizz?
Mentos fizz because of the nucleation sites on the surface of the Mentos. These are basically microscopic holes and when it comes into contact with the coke all of the dissolved carbon dioxide condenses and form bubbles that wear away layers of the mentos where more nucleation sites are accessible by the carbon dioxide. This is why the reaction is not repeatable with the same coke or a flat coke.
Rather explosively. When you mix Diet Coke and Mentos, they will fizz like there's no tomorrow. If you want to try this, do it outside.
Mentos makes a geyser shaking it just make it fizz over the top but if you take diet coke and two mentos put in the mentos then the top really quick and shake it up and throw it on the street (far away from you) you will be pretty satisfied.
mentos
Mentos!!
it makes it shoot out the bottle, the coke.
because its AWESOME