Yeah - this is a really cool riff on a mask illusion, standard stuff for most intro psych courses. The most frustrating thing about it, though is that even when you KNOW that the shadows are... misleading... shall we say, it is quite literally impossible to stop the illusion. The dragon's a little easier to do it with because his interesting-ness lies in his head's ability to crane, etc - but with the hollow face, you can clearly see the shadows and what they SHOULD be... it just doesn't appear. I'll see if i can dig up the video, but yeah - nice find, I'm gonna make one and put him on my bookshelf.
Woot! Found it. Linkage!