Originally Posted by
LoveToStack
it doesnt switch, it's the same all the way through. I recorded it on my phone when I saw it spinning clockwise then watched it in this thread switch, went back to my phone and it had changed direction on there too. It's to do with how you look at it.
edit; its one of the most famous illusions...don't be so quick to dismiss it just because you can't see it happen, if you keep looking and concentrate hard around the area where shadow meets foot it DOES switch. I found it hard to get it to go back to clockwise though.