A park ranger investigates a noise near his cabin and encounters a massive grizzly bear. Then, days before their destination wedding, a couple takes a river tour in Africa and she's thrown from her raft and ravaged by a crocodile.

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A man working in his garden outside Corpus Christi, TX, is bitten by a rattlesnake that puts him on the brink of death. Then, a man is blindsided by a bull shark that tears the calf muscle from his leg in the Bahamas.

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A triathlete is attacked by a shark while training in Alabama, and a father fights to survive after being bitten by a rattlesnake. Then, a giraffe attacks a couple on vacation in Zambia, and a girls' trip turns deadly in Cancun.

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Twenty miles into a marathon in a remote part of New Mexico, a runner finds herself caught between a bear and her cub. Then, a mountain lion attacks a man working on an oil pipeline in Alberta, Canada.

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On Christmas Eve, a man walking with his two young daughters is attacked by an enormous kangaroo. Then, a lion at an animal sanctuary in South Africa reaches under a gate and pulls a volunteer's legs through the bars.

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A Colorado park ranger is hiking when he crosses paths with a mountain lion and its prey. Then, a woman just steps from her home is walking her dog when she is attacked by a vicious raccoon.

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A professional climber is high up an ice-covered Canadian mountain in the middle of the night when he is charged by a grizzly bear. Then, a former nurse is attacked by a rabid coyote in upstate New York.

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A hiker in Alaska is struck from behind and attacked by a 1,000-pound moose. In Hawaii, something grabs a man swimming a half mile from shore and drags him below the surface.

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A woman is working on her ranch in the California desert with her two rescue dogs when she is attacked by a black bear. Then, a man spearfishing with his friend in Cancun, Mexico, comes face-to-face with a crocodile.

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A man and his brothers are on a dream trip in Alaska when they cross paths with a grizzly bear. In Australia, a woman and her friends are surfing when she is violently struck in the face by a mystery assailant.

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