I don't know a person can die from hanging upside down.
Volunteers from two cave exploration associations and 10 fire departments fought to free Jones but, Cannon said the hard rock of the cave's walls slowed drilling efforts.
"It is very, very hard rock that is difficult to do anything with," said Cannon. Rescuers who were trying to chip away at the rock "had a five inch section they drilled away and it took them an hour and a half."
Man Trapped in Utah Cave Had Limited Time, Doctors Say - ABC News