Touching the Void - The story of Joe Simpson's accident and harrowing survival in his climb with Simon Yates on Siula Grande in the Andes. I'm not sure the best way to view this.
The part in Touching the Void where the the man begins to hallucinate that happy, irritating song ought to have a scientific explanation for it. I often have a song play in my mind when I hike, but doubt that my experience is even close to what he experienced.