take two people, one zorb & a sizable 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 zorb, as you & a friend slip & slide around inside the ball with thirty liters 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.