Stare at the center of the spiral for about a minute. Then look at the back of your hand...
It will appear to be twitching and moving, as though bugs were crawling under your skin!

Distorted Circle
The circle in this image is perfectly round. The lines in the background distort the circle so that it appears squashed.

Rotating Effect

Illusion Count
Can you find the 9 faces?

Parallel lines
Are the horisontal lines parallel or do they slope?
