Ok, this is bugging me.

I found this article on the Herald Sun. It claims that the revolving image can be interpreted as spinning both clockwise AND counter-clockwise, depending on how you look at it. Apparently, left brain thinkers see it spinning counter-clockwise, while right brain folks see it spinning clockwise. But, they also claim that it's possible to switch the direction she's spinning while you watch it.

I've tried. I've tried a lot. Hell, I've sat here for the last ten minutes, watching her revolve stubbornly clockwise, and the only thing I'm getting from it is that whoever animated her certainly didn't have their xy axis locked. Maybe that's where the trick lies?

I'm usually pretty good at these optical tricks. Magic Eyes don't phase me, and those concentric circles spin pretty damned fast. But this one? Can't do it. I can't even puzzle out the logic of how the illusion would work. I just see a poser model, spinning clockwise. Maybe my left brain's broken?

LINK! : Right Brain vs Left Brain