Glimpse while sleeping causes lucid dream

[Aimblack]

I didn't even know that was a thing. So I was there just sleeping and in my sleep started to remember what @winterknightsaid  about how thoughts themselves are a subtle form of dualism because they imply that there are two things:  the thought and whichever perceives the thought (I hope I got that right). Then the question "What is reality?" popped into my head and then I "understood" the question and everything disappeared and I realized that this is it and that right now I'm actually dreaming. From then on I was awake and observed my dreams as if I was sitting in a movie theater until at one point I drifted away into sleep again.