In May 2003, American mountaineer Aaron Ruston was trapped for 5 days and 5 nights because his right arm was crushed by a rock while climbing in a canyon in Utah. In order to escape, he endured severe pain and spent more than an hour At the same time, he fractured the radius and ulna in succession, used his sports shorts as a temporary tourniquet, and then cut off his right forearm from the elbow with a knife. After escaping from under the rock, in order to fight the blood loss, he climbed through the narrow and windy canyon with superhuman perseverance, descended to the bottom of the 60-foot-deep canyon, and then walked 5 miles to meet the rescuers and finally survived.
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