A scientist falls into a crevasse in the Himalayas; a man plummets to earth when his parachute malfunctions; a woman almost drowns after being dumped from a raft in the Colorado River.
A skier buried in snow risks suffocation; a frenzied hammerhead shark chases a kayaker to the beach; a near-death experience as a plane plummets into the sea.
A kayaker fights for his life in a raging torrent during a flash flood; a solo sailor adrift in the middle of the North Atlantic; a man films a light plane crash into the forest.
A spear fisherman is visited by a tiger shark; two young divers encounter a great white shark in Australia.
A spearfisher blacks out underwater and is saved by his best friend; climbers are swept off a mountainside by an avalanche; two men are chased by a black bear while jogging in a Canadian forest.
A snowboarder gets trapped six feet under the snow for an hour; a terrifying flash flood in Maui; youthful hijinks leave friends injured and trapped on a Utah mountainside.
