Wow - lookie here! I have always been fascinated with optical illusions, and I jsut found some really good ones. More 'line' optical illusions to follow - these all concentrate on 'rotational' illusions.
Before anyone tells me I posted animated Gifs - I can promise all these images are static!
Rotating Snakes
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Stare at one part of the pic and the rest of the 'snakes' appear to be rotating...
'Dongururin'
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Similar to the last one...
Radioactive Rainbow
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This is harder to see, but if you stare for a while you should see faint radial lines of colour....
Advance
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This is the biggest headfuck of all. Stare at the image and the rings appear to move forwards and back. Now move yourself towards the image - not only do the different rings rotate in different directions, but when you move back both rings change direction...