An experienced golf ball diver is attacked by a territorial, 400-pound alligator in Tampa; a man snorkeling is dragged under by a 12-foot saltwater crocodile; in Africa, an experienced guide is attacked by a hippopotamus intent on defending its turf.

An experienced golf ball diver is attacked by a territorial, 400-pound alligator in Tampa; a man snorkeling is dragged under by a 12-foot saltwater crocodile; in Africa, an experienced guide is attacked by a hippopotamus intent on defending its turf.

While hiking in Montana, a father and daughter are attacked by a grizzly; after visiting hot springs in a nature park, a mother and son are mauled by a 400-pound black bear; two friends are ambushed by a grizzly bear in the Alaskan wilderness.

While hiking in Montana, a father and daughter are attacked by a grizzly; after visiting hot springs in a nature park, a mother and son are mauled by a 400-pound black bear; two friends are ambushed by a grizzly bear in the Alaskan wilderness.