Mr. Angry man and Mrs. Calm lady - If you take a look at the two faces from you chair in front of your computer, you'll see an angry man on your left and a nice, calm lady on your right. But if you stand up and move away from your computer, when you look at the pictures from at least 3 meters away (8 feet), you will see how they switched places! The angry man is now on your right and the nice lady on your left! It seems these photos were created by Phillipe G. Schyns and Aude Olivia from the University of Glasgow, by using some sort of low frequency filters.