Put about a cup of vinegar into a water bottle, next put about two tablespoons of baking soda in a sheet of paper towel and wrap it up tightly (I find paper towel works better than plastic wrap), Next drop the paper towel into the water bottle and screw on the lid as fast as you can, then shake it ...
This is an array of fun stuff you can do with Diet Coke, Mentos, and some dry ice. Enjoy!
This paper bomb can go to as loud as a shotgun could. Just don't do it outside. Nothing to bounce sound off. So use your brain. otherwise you can scare the living crap out of a friend. Alright. I'ma word this out. here: First fold the paper in half and half again. Then unfold and fold it ...