Journeys Out of the Body (1971)
…The vibrations came quickly and easily, and were not at all uncomfortable. When they were strong, I tried to lift out of the physical with no result. Whatever thought or combination I tried, I remained confined right where I was. I then remembered the rotating trick, which operates just as if you are turning over in bed. I started to turn, and recognized that my physical was not "turning" with me. I moved slowly, and after a moment I was "face down," or in direct opposition to the placement of my physical body. The moment I reached this 180° position (out of lucid dreaming, opposite polarity?), there was a hole. That’s the only way to describe it. To my senses, it seemed to be a hole in a wall which was about two feet thick and stretched endlessly in all directions (in the vertical plane).
The periphery of the hole was just precisely the shape of my physical body. I touched the wall, and it felt smooth and hard. The edges of the hole were relatively rough. (All this touching done with the non-physical hands.) Beyond-through the hole—was nothing but blackness. It was not the blackness of a dark room, but a feeling of infinite distance and space, as if I were looking through a window into distant space. I felt that if my vision were good enough I could probably see nearby stars and planets. My impression, therefore, was of deep, outer space, beyond the solar system, far in an incredible distance.
I moved cautiously through the hole, holding onto its sides, and poked my head through carefully. Nothing. Nothing but blackness. No people, nothing material. I ducked back in hurriedly because of the utter strangeness. I rotated back 180°, felt myself merge with the physical, and sat up. It was broad daylight, just as when I had left what seemed a few minutes before. Lapsed time: one hour, five minutes!..