Take two people, one Sphere & a sizeable hill & what have you got? This is a fun, extreme activity which will see you writhing around in a spherical universe where the sky is the ground & the ground is the sky & your stomach made a bid for freedom some time ago. You'll love it! With no harnesses you are completely free in the Sphere, as you & a friend slip & slide around inside the ball with thirty litres of water. Instead of being thrown around with the ball, link arms with your friend & slide together down a hill, riding the water like a flume..