It can be seen turning clockwise, and anti-clockwise. Maybe it's easier to download picture, and open it in IE (it turns slower then).

Other "trick" is to click and drag the picture holding left mouse button (works when opening the page in Firefox) and rotation stops, then You have to visualize the girl standing on right foot, an force you to expect she will turn anti-clockwise, release the left mouse button, and she will be turning anti-clockwise.