Dragon Illusion

This is a cool optical illusion. I've downloaded and made one as per the given instructions and got stunned. When I moved left and right, this dragon stares at me and seem like moving its head. Have a look at the video, to see what I mean.

How does it work? If we move around when viewing a solid object, our brain knows how the object we are looking at should behave. However the dragon gives us the wrong clues, because we mis-interpret what its shape is. We assume that the nose of the dragon is pointing out towards us, but in fact the dragon's head is concave.

Download a copy of the actual dragon and try this illusion for yourself. you have printed the dragon out (a colour printer is best since this is a colour image) then you can cut out the dragon, fold and stick it, and you will be able to see this fantastic illusion yourself. When you print the page out, you will see that the instructions for folding the dragon are included. Please follow these instructions exactly.