Okay, I'll bite: What's the deal with Mentos and Diet Coke?
As I've learned from my son, it shoots off like a rocket when put together. You can see it in action at YouTube.com.
You've never seen?? Oh man. It is cool. Check it out:
Mentos Coke Explosion
Three professors, if you can believe this one, worked on a project, I assume physics, and came up with a "formula":
Take a diet Coke (it only works with DIET COKE..they tried hundreds of other sodas).
Add Menthoes.
You will get an active water fountain in minutes.
Don't do this experinment inside. Use a 24 pack of diet coke and pack of Menthos and you'll have your own dancing water garden...music optional (use boombox, ipod or turn the house stereo speakers on loud).
Saw the article in the scientific portion on "how to" in the Wall Street Journal a couple of months ago. Suspect an experiment awry ala the silly putty invention.
Have fun - I'm surprised this hasn't been done on airplanes but with enough readers, the airlines may have to ban diet coke and check your pockets for menthos. Could be very effective diversion, actually.