Hehe, yeah optical illusions are great. The last isn't a real optical illusion though, it's just an excellent drawing
. I especially like the ones with the dots, all the purple dots disapeard at the exact same moment, it can get really scary sometimes.
Oh, did you know that while your eye and after that your brains recieves over 400 billion pieces of information only 2000 pieces of information reaces your consicousnes (sp?) after a long process of data elimination?