After running out of food and water on the fifth day, Ralston decided to drink his own urine. He carved his name, date of birth and presumed date of death into the sandstone canyon wall, and videotaped his last goodbyes to his family. He did not expect to survive the night. After waking at dawn the following day he had an epiphany that he could break his radius and ulna bones using torque against his trapped arm. He did so, then amputated his forearm in about one hour, with his multi-tool, which included a dull two - inch knife. The manufacturer of the tool was never named, but Ralston said "it was not a Leatherman but what you 'd get if you bought a $15 flashlight and got a free multi use tool. ''
how does he cut his arm off in 127 hours
with his multi-tool