Update – This paper dragon is an even better illustration of the effect, and you can make your own (if you have a printer). Amaze your friends! Really, you will.
Everyone’s talking about the hollow mask illusion, a.k.a the hollow face illusion. Wired have a nice piece about this freaky visual phenomenon, complete with YouTube video so that you can see it for yourself. It’s seriously weird. Here it is on YouTube:
