Medsec, it was a banner advert, on this site, showing a Ballerina in silhouette spinning on the spot. It asked if you are left or right brained (did she spin left or right). She was performing a turn rising from her flat foot, with a bent knee, as her free leg is extended to her front, then whipped around to spin her on the spot. I was astonished to find that I could make her spin either way, just by thinking about it. It was, like all of these types of adverts, very irritating, I did not respond to its nonsense and am glad its gone.