Instruction Look at the
centre of one of the circles. The circle that you concentrate on stops,
but the rest keep spinning - weird. By the way, the above image is not animated. They are perfectly
Here is Another Swirl Illusion
How is it that those two circles appear to rotate in opposite directions?
Disappearing Down The Chocolate Plug-hole
What Do You See Here?
Insomniacs should see it straight away!
If not see here