Hello world,
This illusion is interesting if you haven’t seen before. I am noting an explanation at the end, but do tickle your brain a little before reading it.
Our brain thinks that face is always convex. If you change angle of view, you expect certain facial features to become ‘hidden’. So if no features go out of sight it implies that the face is following your angle of view. This dragon’s face is painted on concave surface – so you can see the whole face over very wide range. Which the brain misinterprets as the movement 
Posted by Shalin Mehta 
