Dreams.

Well, that was something. I don't remember the details, but the gist is this: for some reason, I ended up in a mental hospital with two guys who looked like Gordon Freeman and G-Man. Basically, we were trying to escape. I distinctly remember that we were pulling off some tricks, talking to the doctors and nurses (although there shouldn't be many of them in a mental hospital), and then either we started a fire or something else. And overcoming each floor was like completing a "level" in some kind of shooter, and the lower we went, the harder it got.