Optical Illusions

I have just made a very interesting discovery.  I have a block on my iGoogle homepage that randomly posts optical illusions.  I've always been a fan of this type of art and am particularly fond of M. C. Escher.  What I have discovered is though my entire world constantly spins at varying rates of speed but never stops, when I look at optical illusions which to the rest of the world appear to be moving, they are perfectly still to my eyes.  I've always thought it was odd I could read without difficulty, but cannot perform the simplest of household chores without barfing.  Now I find that what the rest of the world views as moving, I perceive as static.  SCDS gets curiouser and curiouser.