Danger lurks just below the surface in the Pacific Ocean. A woman on an afternoon swim is suddenly attacked by a great white shark. And, a tiger shark attacks a spear fisherman.

Hiking in the Montana mountains, trail engineer Todd Orr is attacked twice by a grizzly bear protecting her cubs, during a vacation in the Bahamas, Tiffany Johnson is snorkelling when she finds herself face-to-face with a tiger shark.

A shark attacks Micki Glenn on a diving trip and her husband and friends must save her. A giraffe assaults a couple celebrating their wedding anniversary on safari.

Paul Templer is in a canoe near Victoria Falls when a hippo drags him into the water. In Texas, five-year-old Jade DeMoss is attacked as she looks for her mum.

Wayne Petteway is attacked by an alligator while checking crab pots in North Carolina. Camping in Arizona with his girlfriend and baby son, Peter Baca awakes to something attacking his tent.

Nicole Moore is on holiday in Cancun, Mexico when she is attacked by a shark. In Tennessee, Kyle Watson is hiking in the woods when he is bitten by a rattlesnake.