I have dreams that can last months, I had one last what I preceived as years before. I mean yeah I was only asleep for maybe 5 or 6 hours but the dream went on for a long time. I've had about four of those since I was a kid. Waking up after one of those is extremely disorienting and I have to remember where I am and reacclimate to current time. I used to rationalize it as being part of a different timeline because it's always me, I can see myself, I can read, I have feelings, I feel pain, I sleep and eat, there's no way to tell that I'm dreaming. But my age In these dreams is whatever I am when I fell asleep. It's absolutely nuts and freaks me out every time it happens.