Attention, Portal 2 fans! Gary Hudston commissioned a series of custom levels of the game.
The clever puzzles were put together by designers Doug “TopHATTWaffle” Hoogland and Rachel “Miss Stabby” van der Meer, who should probably be hired by Valve to work on Portal 3. And if you’re wondering how they did such an accurate GLaDOS impression, well, that’s Ellen McLain, the actual voice of GLaDOS.
If you don't care anything about the game, you should skip ahead about six minutes and watch the rest anyway. The Daily What Geek has this plus a second video, the “super-sexy cinematic version”. Link