Take two averagely sized logically challenged people two safety harnesses one sphere and a sizeable hill and what have you got the latest extreme activity which will see you writhing around in a spherical universe where the sky is the ground and the ground is the sky and your stomach made a bid for freedom some time ago youll love it riding the sphere down a hill at speeds of up to 30mph is fast paced exhilarating and terrifying fastened in just close enough to see the fear and derange