Do you see her spinning clockwise or counter-clockwise? I only see her spinning clockwise.
I saw this for the 1st time about 2 years ago, but it just resurfaced in a convo w/ a friend, so I was fooling around w/ it again. Supposedly if you're right brained it goes clockwise, & if you're left brained it goes counter clockwise, but who knows, maybe it's all just BS. Some people say they can make it change directions, give it a try, maybe it will work for you. I kinda think it spins clockwise only, & people lie about counter-clockwise.
Btw, if you complain that this is stupid or that you've seen it before, just know that you're a d-bag. Enjoy.
If you've never seen this before here's the explanation (cutting & pasting):
The spinning girl is a form of the more general spinning silhouette illusion. The image is not objectively “spinning” in one direction or the other. It is a two-dimensional image that is simply shifting back and forth. But our brains did not evolve to interpret two-dimensional representations of the world but the actual three-dimensional world. So our visual processing assumes we are looking at a 3-D image and is uses clues to interpret it as such. Or, without adequate clues it may just arbitrarily decide a best fit – spinning clockwise or counterclockwise. And once this fit is chosen, the illusion is complete – we see a 3-D spinning image. By looking around the image, focusing on the shadow or some other part, you may force your visual system to reconstruct the image and it may choose the opposite direction, and suddenly the image will spin in the opposite direction.
Oh, & please note the nip detail.