When you look at these photographs of celebrities you will probably be left creeped out as at first glance something appears a little different about them. What you are seeing is known as the Thatcher Effect, which works because of how our minds make sense of flipped images when parts of one's face are flipped and others are not.
Our minds naturally make sense of an otherwise 'odd' looking image by flipping the smile and eyes the right way around, however when the image is rotated back to it's normal position the upside down eyes and mouth become clear again.
This is seriously cool. Who knew!?
Robert Downey Jnr