I was in bed and I thought of this question. I'd try it myself but it requires lucid dream and I am as of yet perfecting that skill. So anyways, here's what I was thinking.

So, I know when you guys have lucids you usually go and live your dream life away. But what were to happen if you went back to sleep in your lucid? Would you have a dream? Would you stop dreaming and wake up?

I just thought it'd be cool to try it out. I was thinking, let's say you fall asleep in a lucid and have a dream. You become lucid in it and fall asleep in that one. You continue on and on and on till whenever. Then you wake up from the last dream, only to find that you're in the previous one. And as you try to get back to reality, you find that you can't escape the dreams. That would be so wierd, don't ya think?

Anyway, somebody try it. And if my scenario above happens, sorry.