If you watch the above images from your seat in front of the computer, Mr.Angry is on the left, and Mrs.Calm is on the right. Get up from your seat, and move back about 2.5 Meters!! ( 6 or 10 feet) They switch places!! I believe this illusion was created by Phillippe G. Schyns and Aude Oliva of the  Univ. of Glasgow.