This has to be (one of) the best illusion(s) ever created.

If you look at the above images from your seat in front of the computer, Mr. Angry is on the left, and Ms. Calm is on the right.

Get up from your seat, and move back 12 feet, and PRESTO!!
They switch places!! 

It is said this illusion was created by Phillippe G. Schyns
and Aude Oliva of the University of Glasgow. 

This proves that we may not be seeing what's actually there,
all the time!!?? Spooky, huh?