This has not happened to me in a while, but I used to ride a bus to school. In the mornings, I would often fall "asleep". I believe I actually was asleep, but I could hear everything happening around me and even wake up with very little effort. Anybody else experience this/ know what this is?

P.S. I just joined this site about 5 minutes ago. I am not new to lucid dreaming, just came here looking to increase the frequency.