I once had a dream that felt like it lasted a lifetime. In this dream, I had a whole new life, a different wife, kids, and I lived it through to the end. Then I woke up. It was the weirdest thing ever and I often think about it.
[0] https://en.wikipedia.org/wiki/The_Inner_Light_(Star_Trek:_Th...
[0] https://www.reddit.com/r/AskReddit/comments/oc7rc/have_you_e...
I've told this to people, and they did not believe me.
It took a good 3 days to shake off all of the emotions I was feeling over a dream. I did a fair bit of research on this and found that many people report the same happening to them.