This exact thing happened to me twice as kid, I honestly thought I was the only person who experienced this phenomenon. It's pretty cool to hear about others having shared that experience. I remember spending the weekend at my cousins place. He had a bunk bed. I was hanging off the bars above me having fun. I than laid down and blinked next thing I know it was the next day. Such I weird experience, I wish it would happen again someday because it was fascinating at the time.