Thinking With Portals. (Yum, Cake.)

For those of you still unfamiliar with Portal (One of the 5 game in the Orange Box) I've embedded the trailer above. Portal is easy to understand but impossible to explain to someone, the video does a better job then I could ever do. Below I have encoded the song that plays at the end of Portal, don't worry it's got not spoilers, but even if you've only played a little of Portal you should still find it very entertaining.

And to all those who have played Portal, I hope you get your cake soon...