Erin Greene is walking home from a Halloween party in a small Arctic town when a polar bear chases her down. Also: Triathlete Chuck Anderson is swimming in the Gulf of Mexico when a bull shark attacks, biting his arm and pulling him to the ocean floor.
Taxidermist Wilf Lloyd is hunting with his son-in-law in the Canadian Rocky Mountains when a grizzly bear charges. Also: Spearfisherman Anthony Segrich is miles from shore, diving 180 feet below the surface when a bull shark races at him, jaws wide open.
Jim Lane is picking blueberries alone in the Blue Ridge Mountains when a timber rattlesnake strikes. Also: Teacher Rachael Lilienthal is swimming in a Florida river when an alligator bites down on her arm, pulls her underwater and doesn't let go.