Great white shark torments cage diver in incredible video

A woman has filmed a terrifying encounter with a gigantic great white shark while cage diving in South Africa.

Hillary Rae Petroski, from New York, uploaded a video to Facebook, captioning it: 'My little fun adventure while shark cage diving in Mossel Bay.’

The vision, taken from both above and below the surface of the water, shows the four-metre shark circling the thrill-seeker as she swims inside a metal enclosure.