"One of my favorite methods of escape was what amounts to gentle asphyxiation. I used a piece of cloth that I cut from the remnants of a blanket. I called it my dream rag. I wet it with sea water so that it was soaked but not dripping. [...]. I would fall into a daze, not difficult for someone in such an advanced state of lethargy to begin with. But the dream rag gave a special quality to my daze. It must have been the way it restricted my air intake. I would be visited by the most extraordinary dreams, trances, visions, thoughts, sensations, remembrances. And time would be gobbled up."
January 1, 1970
https://en.wikiquote.org/wiki/Asphyxia