watch this video:
http://viscog.beckman.uiuc.edu/grafs/demos/15.html

the aim of the game is to count the number of passes made by the team wearing white t-shirts. Your brain will deceive you whilst watching this video.

Post the number of passes you count then go to this thread to see how you were deceived.
http://www.drownedinsound.com/articles/2432962

please post astonised responses in the other thread or you'll spoil it for everyone.