Challenge your friends to a drinking race you're guaranteed to win. It's all about physics, man!
-The Setup: grab a couple of bottles of beer (or soda) and a bendy straw that's at least as tall as your bottle. Set pint glasses next to them and set up the following challenge!
-The Challenge: without moving the bottles (imagine they're glued to the table), the object is to be first to get all the beer from your bottle into the pint glass, and you *must* use the straw.
-The Solution: give them as much of a head start as you like, then bend the top of your straw over to aim into the pint glass. Seal your mouth over the bottle and straw, and then blow. The internal increase in pressure will shoot the beer out of the straw and into the pint glass!