Excerpt (from https://exweb.gearjunkie.com/top-expeditions-1970-2020-6-gasherbrum-ivs-shining-wall/)

“Out of fuel, they couldn’t melt snow for water and had no food left, either. McDonald describes how a hallucinating Schauer believed that there was a third member of the team, determined to kill them by pushing them into the void. The Austrian climber later recalled that he saw himself transformed into a raven, looking at his own corpse from above. Kurtyka himself went in and out of consciousness. When he was awake, he focused on his imminent death, which he accepted with dignity and calm.

…

Halfway down, hallucinations overtook them both: Kurtyka also felt, rather than saw, the ghostly third man on the team. It required nearly a miracle of human endurance to reach a food cache that they had left at 7,100m during the acclimatization phase. When they finally stumbled into Base Camp, they just collapsed.”