Where will it end?
Make your own illusion. It is a bit more complicated then the thing i tried the other day. The link is flash tutorial showing you how to make your own zoom art illusion.

Dragon illusion origami. To understand why this one is an illusion, you'll have to download the video. It is quite astonishing, although it could be like magic eye, some people get it, some people don't.
Some More:

This Hurts my head. Literally

This one really messed me up. Probably one of the best ever. If you don't believe it, open the image in an image program and cut a square from square A and drag it over to square B, they are exactly the same shade.