On one of my stop-overs in Cairns, Australia on the way to PNG (See Palms of Kikori, PNG), I took a boat out to the Great Barrier Reef to have a look at the coral and sea life. During the trip out to the reef, a humpback whale (Megaptera novaeangliae) breached the water several times and started slapping it's massive flukes on the ocean surface. I managed to get my video camera out in time.