There's a new game that is sweeping the playgrounds of America and it's called cup-stacking. My first thought when I heard the phrase "cup-stacking" was that it might involve women somehow putting their breasts on top of something (anything will do) but, alas, I was wrong. "Cup-stacking" is in fact, the stacking of cups.
The idea is to take a certain number of cups and stack them into pre-determined formations as fast as possible (hey, it's no more stupid than cheering competitions). It doesn't sound to impressive until you see someone do it. Keep in mind that this video runs at normal speed.
Cup-stacking world record.