I thought it would be a great idea to share something I learned in the physics class I took in high school. It involves mentos and diet coke. I remember it well because we actually conducted the experiment and made a huge mess in the school yard. Dropping a mentos into a bottle of diet coke causes it to fizz up and explode so to speak. The soda shots up and then comes back down. You can measure its position as well as it's velocity. The link below gives you a visual example of what I've described.

http://m.youtube.com/watch?v=hKoB0MHVBvM&desktop_uri=%2Fwatch%3Fv%3DhKoB0MHVBvM

-Ashley Cho-Quang-Sam