Have you guys seen these things? We just got them in at work and basically they spin both horozontally and vertically, up to somewhere between 9,000 and 13,000 rpm. After getting enough of a spin you turn it side to side, kind of following the shifting of the weight/force like shaking a half empty bottle drink and it can get really fast. It's supposed to be good for all kinds of sports where grip control is important and I think they say it helps with recovery from carpel tunel syndrome. The product we have is called Dynaflex..