After working your butt off for three weeks, one might want to do something else.
When I'm not sleeping, I like to improve my house, apart from my work for Anime 2008 and a few other hobbies; other people decide to get creative in a different way.
Making music with Windows sounds, for instance, or gathering a whole bunch of your friends, distant relatives and total strangers to play
Human Space Invaders (this guy also made similar movies involving
Pole Position,
Tetris and
Pong).
I leave you with another classic I saw about ten years ago for the first time:
Ping pong, Matrix styleCheers, K.