Mentos.
because the mint from the mentos and the gas from the soda make a gyser.
more mentos shake up the soda prior mush up mentos
you can use Mentos and baking soda
Dropping Mentos into soda will cause it to explode.
When you do the soda thing, slide mentos into the 2liter bottle of soda, when i goes off make sure your standing back. The explosion will not harm you from the inside or out.
mentos or you shake it
Mint Mentos.
open a coke bottle to fast.
Shaking it would be your best guess.
mentos!!! but only with diet soda!!
I think more soda is better.