Dreams.

I can't remember half of it now, but it was great. It was like a post-apocalyptic setting; we lived in large caves, everything was bright, very civilized, beautiful, and clean, and there was a system of these caves, we called it something like an alliance or a union. So, one day, I and some of my friends went on a scouting mission and ended up in other caves. It was also a huge system, but more complex, and everything was overgrown with greenery and various plants that we didn't know, and there were also people living there, but they hadn't heard much about us; there had been an unsuccessful encounter in the past, and they considered us to be quite wild, but we persuaded them to let us stay, let us explore, and they showed us their spaceship. And also, I dreamed that I had some really crazy computer games, and there were already games that I knew (I remember Morrowind and The Sims), and at some point, I wanted to make a copy of the save files because the system was malfunctioning, and in all the games, some setting was displayed as a portrait of Luke; I even thought, "Wow, Luke is cool; they're already using him to represent settings everywhere."