As in the dream you had while sleeping.
Mine had me seeing the sky distort and turn into some sort of dimensional rift. I remember seeing black goo falling from the sky and seeing a large, sandstone ceiling cover everything. Just beyond the reach of clouds I saw a rocky ceiling with square holes in them that lead into the darkness of space. Then, after getting lost in an ancient pyramid, the sky then turned into planets phasing into one another. Like textures in a video game overlapping one another. I saw lights in the sky flying around like fireflies and hearing a voice saying “You’re quarantined on this planet. You may not leave but we can.”
I dreamt of this in the first weeks i started to go to work by train. My route passes normally next to a cemetery city. There are literal skyscraper like complexes of in wall graves. I dreamt that my usual train stopped in te middle of nowhere, next to those buildings. I just got out of the train. Headed to one of them and got up the stairs of one of them. As i got in one of the levels. I heard a voce ask me “where have you been? It’s been so long.” as i turned to see who it was. I woke up.
The reason why it’s still sutch a vivid memory is when i woke up, i searched for how the levels were. And they were almost exactly how i dreamt them. It most likely was my mind just adapting what i remembered of the dream to match with the image. But it still kept it in my mind.