As someone who has played, and watch someone else beat Portal, I have a strong love for the game. It's awesome, and hopefully they release a development SDK so that other people can create some awesome custom maps. For now, there is Garry's Mod, which allows for some pretty hilarious videos to be created. Take for example the video above. A day in the life as a turret. Who didn't love the turret? Creepily awesome. It sucked to have to destroy them, but it was completely necessary. This video is craftily done, and I encourage you all to check it out.