This is my favorite illusion.
First you must click on the image to download the spinner...
Then, you must stare at the center of the spinner for 30 seconds...
Finally, look at the back of your hand.
click HERE (then choose run)

Stare at the black dot in the center;
after a few seconds the gray area will dissapear...

Can you see the phantom black dots?

I'm not sure what message the artist was trying to convey here...

The horizontal lines appear to tilt from one side to the other

Tilt your head to the right to see this man's true nature

"Carnie", the side-show elephant:

Is this a picture of a duck or a rabbit?
see answer below

Answer: it doesn't really matter; it's open season on 'em both