Optical illusions

[Phil_dB]

This is quite baffling...

http://www.johnsadowski.com/big_spanish_castle.php

[Phil_dB]

http://www.moillusions.com/wp-content/uploads/i207.photobucket.com/albums/bb234/vurdlak8/2007b.gif

This is someone's avatar on here I think - I didnt realise it's an optical illusion, - some people see her turning CW, others ACW, - with a bit of practice, you can see both, - and get her to swap direction..!

[Maxine]

http://www.moillusions.com/wp-content/uploads/i207.photobucket.com/albums/bb234/vurdlak8/2007b.gif

This is someone's avatar on here I think - I didnt realise it's an optical illusion, - some people see her turning CW, others ACW, - with a bit of practice, you can see both, - and get her to swap direction..!

I think it's Caro's avatar

at different times it moves in different directions for me and if I look at it I can make it swap