A grizzly bear charges taxidermist Wilf Lloyd while he hunts elk with his son-in-law in the Canadian Rocky Mountains. Miles from shore, diving 180 feet below the surface, spearfisher Anthony Segrich finds a bull shark charging toward him.

A bull shark attacks a triathlete who is training in Alabama; a father fights to survive after a rattlesnake bites him; a giraffe attacks a couple in Zambia; a girls' trip turns deadly in Cancun.

Bob Legasa's hunting in Montana and what he thinks is a bluff charge from a grizzly bear is, in fact, a near-lethal attack; while canoeing in Zimbabwe, Kristen Yaldor's thrown into the water and finds herself in the jaws of a hippopotamus.

Twenty miles into a marathon in a remote part of New Mexico, Karen Williams finds herself caught between a bear and her cub; Steve Campbell is working on an oil pipeline in Alberta, Canada, when a mountain lion attacks him.

Louie van Grootel is working in the Canadian wilderness when he's attacked by a massive grizzly bear. In Colorado, Travis Kauffman is trail-running and comes face to face with a hungry mountain lion.

A black bear charges Joe Azzouggagh and his German shepherd, Ace, deep in the Ontario wilderness. Single father Andrew Dickehage, forced to walk six miles along a rural road at night, comes under attack from unseen predators.

A polar bear chases down Erin Greene as she walks home from a Halloween party in a small arctic town. A bull shark attacks triathlete Chuck Anderson in the Gulf of Mexico, biting his arm and pulling him to the ocean floor.

On Christmas Eve, Matt Chenhall is walking with his two young daughters when he is attacked by a kangaroo; Lauren Fagen is volunteering at an animal sanctuary in South Africa when a lion reaches under a gate and pulls her legs through the bars.

On family trip to the Canadian wilderness, 12-year-old Zac Delventhal is dragged from his sleeping bag by a hungry wolf; while swimming in the Pacific Ocean, Maria Korcsmaros is attacked by a great white shark.

Colorado park ranger Andy Peterson is hiking when he crosses paths with a mountain lion and its prey; in Vancouver, Kari Toft is walking her dog just steps from her home when she is attacked by a vicious raccoon.

Allena Hansen is working on her ranch in the California desert with her two rescue dogs when she is attacked by a black bear. And in Cancun, Mexico, Jonathan Schoeneman is spearfishing with his best friend when he comes face to face with a crocodile.

Catherine Dwinnell is hiking in Alaska when she is struck from behind and attacked by a 1,000 pound moose. In Hawaii, Tony Lee is swimming a half mile from shore when something grabs him and drags him below the surface.

Nicole Moore's vacation in Cancun, Mexico is cut short when she is attacked by a shark close to shore. In Tennessee, firefighter Kyle Watson and his family are hiking in the woods when he is bitten by a timber rattlesnake.

On a family trip to Pattaya, Thailand, Helen Costigan attends an elephant show when one of the massive beasts turns deadly; golf ball recovery specialist Scott Lahodik is diving in a Florida lake when he's attacked by a vicious alligator.

Professional climber Greg Boswell is high up an ice-covered Canadian mountain in the middle of the night when he is charged by a grizzly bear. And in Upstate New York, a retired nurse is attacked by a rabid coyote.

Andrea Schlake is volunteering at an animal sanctuary when a chimpanzee escapes its enclosure and chases her down. Surfer Todd Endris is ready to catch a wave when a great white shark knocks him off his board and attacks him.