Thrillseekers were recently able to walk on water in one of the fountains, in the square beside Cook and Phillip Park. The 3.2m clear plastic inflated orb has double-sectioned balls, with one ball inside the other and an air layer in between. Zorbing usually involves an orb rolling downhill or off a ramp but in this case the rolling was on water. The rope ensured thrillseekers didn't end up rolling down the hill into the park or into the traffic on College Street or William Street. It was one of the attractions here at the recent Australian Winter Festival which also featured an ice rink.