Dr. John All was clinging on for his life on a frozen ledge after he slipped into an icy deathtrap.

He was covered in blood, baldy bruised and battered all over, and there was still another 300-feet of darkness below him.

He was struggling to breathe and his arm was broken, but after seeing the blue sky 70-feet above him, he knew he had get out.

This may sound like the kind of accident to be had by a rookie climber, however, this wasn’t the first time that Dr. All had been mountain climbing. He is in fact an accomplished mountain climber, as well as a scientist and author, with lots of experience in trekking and climbing in remote areas.