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
posted by -->C.Y<-- @ 9:51 PM
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