OMG I just managed to change the direction of the ballerina lol.
I find, you have to look away from it, not too far, and follow the arm and the leg, keep watching until it appears that the arm moves faster than the leg, and it changes direction.
Actually... Just concentrate really hard on something else, and it'll happen, if you get it spinning anti-clockwise, look downwards on the picture, it may turn back.