I'm on the same opinion as you

You can seamlessly transfer from SP to a dream, so you wouldn't even notice it most of the time. It happens even more easily when you close your eyes, which you did as well...
I also had an experience like this, when a second hand raised from my original one while i was in SP, but that was just a hallucination... simply reasoned.
All the floating above your body and other experiences people say about OBE/APs can be experienced in lucid dreams...

Yet some people still like to believe that OBE/APs are something special...