Mona Lisa looks just fine in the first picture, but there is something terribly wrong with her in the second. She is frowning and her eyes are looking down or they are upside down. Now, turn your head upside down… come on! it’s not that hard! And look at the second picture. The face will pretty much look fine to you. Both of the pictures will look very similar if you do this.
Don’t really stand on your head, just pick up your monitor and turn it upside down… that is, only if it is a very light flat panel monitor. Hey, with all these illusions, isn’t about time to buy a new flat panel monitor anyway? You’ll definitely want to especially if you make it into the desktop background picture gallery a little later in your site tour!