Okay, so there's this truly awesome game called Portal. The game is very different from your average shooter, and the script writing is VERY WELL DONE. I guarantee this game will make you laugh more than once, and besides that, it's damn fun. If you have a PC that can handle Half-Life 2, GET THE ORANGE BOX!
Anyway, if you've played the game, then you have to watch this. It's pretty funny if you understand all the inside jokes. I imagine its not quite as funny without having played the game: