I'm not solipsistic by any stretch of the word, but sometimes things happen that make me feel like this world is a simulation. Like anomalies that might be explained as glitches, or uncannily perfect or repetitive-seeming strangers that act like lazily-programmed NPCs in a video game.
One time at the start of a trip to Atlanta, I saw some people playing basketball, and they were still doing it when I got back even though it had been over 8 hours. There was also this little girl kneeling in the center of a tennis court with absolutely no one watching her. And then there's stuff like deja vu.
I don't know, some people just seem to follow stereotypes too closely as well. Does anyone else get this feeling on occasion?