The lines look bent, but they are actually straight. Is this possible? It looks like there are grey blurs inbetween the large black squares. Relaxe and concentrate on the 4 small dots in the center of the image for 30 to 40 seconds. Then look at a wall near you, or any solid colored, smooth surface. You will see a circle of light developing on. Start blinking your eyes. What do you see? Moreover Who do you see? This is pretty stupid, but is the book facing towards you, or away? If you take a look at the following picture, let me tell you it is not animated. (The image is actually a jpg which can not be animated anyway) Your eyes are making it move. To test this, stare at one spot for a couple seconds and everything will stop moving. Or look at the black center of each circle and it will stop moving. But move your eyes to the next black center and the previous will move after you take your eyes away from it. Focus on the dot in the center and start moving your head forewards and backwards. You should see a face and a word. It took me forever to find the word, I guess I'm slow. I call this image liarface.