On saturday 26th april, 2003,aron ralston went climbing in the utah national park , usa .he didn't tell his friends or family , and he ( a mobile phone later,there was a terrible accident .an enormous rock trapped aron's arm ..he was there for six days .he ( at night because it was very cold .he ( a ng fresh waster, and there wasn't any food . he ( any other people . but aron didn't die .on the sixth day, he ( he amputated his trapped arm with a small knife.then he (6) six miles .finally , a helicopter rescued him .aron ( a book about his experience. now he climbs with an aertificial arm