Pythagoras switch!

http://www.youtube.com/watch?v=84wDrNg7foQ
http://www.youtube.com/watch?v=887CcV1DTO0
http://video.google.com/videoplay?docid=2435046286370275454
http://video.google.com/videoplay?docid=5020961729146478632&hl=en

Common test i arnd the corner.....weeeeeeeeee.........wait..shudn't be weeee-ing..-.-