Aron Ralston
Aron Lee Ralston (born October 27, 1975) is an American outdoorsman, engineer and motivational speaker.
He is widely known for having survived a canyoneering accident in south-eastern Utah in 2003, during which he was forced to amputate his own right arm with a dull multi-tool in order to free himself from a dislodged boulder, which had trapped him there for five days and seven hours. Even after he had escaped, he still had to climb down a 65 foot (around 20m) sheer cliff face to reach safety.
The incident is documented in Ralston's autobiography Between a Rock and a Hard Place, and is the subject of the film 127 Hours.
Read more about Aron Ralston: Background, Accident, 127 Hours