Optical Illusions

I am sure many optical illusions keep floating over the net and most of them are fairly charming. I also love them.

But, here are two that are positively creepy!

Have a look at the pinwheel. This one works best when after you look at the image, you look at the hand on your mouse :) - try it to see what I mean.

And then have a look at dizzying motion. This one's not so striking as the previous one, but is enough to make you dizzy!

N'joy!