A couple of days ago a friend of me showed me this dragon. At first it wasn't really anything special, untill the moment he said to watch to the dragon and close one eye. When I started to move around, still keeping one eye on the dragon, I saw something really cool; It was as if the dragon was following my every move.

The thing that I mostly like about this, is that it's very easy to create. Just print the dragon and stick it to some firm paper. After letting it dry, cut the dragon out of the paper and assemble it using the tabs and there you have it. Your own optical illusion.

You'll keep on watching to this dragon, just put it on your desktop or something.