Optical illusion

very interesting optical illusion. Paper dragon watching over you, as if you did not move, and it will seem that he wags his head.
Because there is such an effect that? It's simple. When we look at an object, our brain tries to recognize its shape and does so on the basis of everyday experience. When we move, then advance to present the trajectory of the object. This dragon is painted in a special way and observers think that his head is convex, when in fact it is not so! Dragon head concave - inspection video to the end to see this.
See also: choose the best illusion 2012. Very quick test to determine your character. Incredible color illusion.

Source: mirfactov.com/