This happened to me yesterday and today while I was taking a nap.

I'm lucid and everything is black, I try to stay in the dream but I can't, I start to feel my body and wake up. After I notice I'm awake I instantly fall asleep again.

I don't remember what I was dreaming before or how I got lucid and it happened very fast. Maybe it was black void and I woke up because I couldn't see anything (I also wake up when I close my eyes during an LD).
What do you think?