Pic by Nan Hauser / Caters - (Pictured: Humpback whale pushes Nan Hauser around in the water, protecting her from shark.) - This is the heart-stopping moment when a giant, 50,000-pound humpback whale took it upon itself to push an unsuspecting snorkeler through the water, looking to protect her from a nearby SHARK. The stunning video and images Nan Hauser and her team were able to capture - including point-of-view footage - show how the whale pushed whale biologist Nan with his head and his mouth, tucked her under its pectoral fin - even lifted the biologist out of the water on one occasion. The moment, Nan, 63, said, is perhaps proof of whales intuitive nature to protect other species of animal - including humans - something she believes has never been captured on film, and intuition the biologist compared to firemen being willing to rush into a house on fire to help save the lives of those they do not know. - SEE CATERS COPY