In Sydney Kerry-Anne and I went on a similar trip to this one offered by Atlantic Adventures. I can still remember slowly motoring back to the harbour listening to Down Under (by the Aussie band Men at Work) at top volume after the ride on the deathly fast and highly maneuverable jet boat.

I'm not sure if this boat is quite as maneuverable the one in Sydney, but from the photos on their site, it sure looks like a hell of a lot of fun. I also noticed that they offer a combo trip that consists of a boat ride and helicopter flip! If you're into adrenaline-releasing experiences then I think this experience could be just for you.