I had a dream where I was watching the 2nd episode of season 4 of Rick and Morty
So Morty asks Rick about wanting to go back in time and see the big bang, and then Rick tells him that he already did. When Morty demands to be shown the time travel technology, Rick decides to send him into the future. (time travel portals are yellow, btw)
So Morty ends up in the 25th century which looks the same as the 21st century except rude teens are hanging around everywhere and there’re monsters. Morty eventually finds his way back in time, only to find out he never time traveled at all. Rick sent him to an alternate reality where Jesus was born 400 years earlier.