Aron Ralston

Aron Lee Ralston (born October 27, 1975) is an American outdoorsman, mechanical engineer and motivational speaker known for having survived a canyoneering accident in southeastern Utah in 2003 during which he amputated his own right forearm with a dull pocketknife in order to extricate himself from a dislodged boulder which had him trapped in Blue John Canyon for five days.