This absolutely happened to me in high school when playing Tetris on my graphing calculator. I'd see the shapes falling as I fell asleep at night. I always thou

This absolutely happened to me in high school when playing Tetris on my graphing calculator. I'd see the shapes falling as I fell asleep at night. I always thought it was because I felt only semi-conscious for stats class in the morning, and I was returning to that "half awake" state while falling asleep. Cool to find out it's a real phenomenon.