dream within a dream?

Hey I was just wondering if this has ever happened to anyone else before.
It's the first time it happened to me. I thought it was really cool.
I was dreaming, and in the dream I fell asleep and began dreaming. So it was like a dream within the dream. After falling asleep in the dream, I became lucid. I had a very good awareness, but my amount of control was really low. for example I tried to fly, and I fell. I woke up once, during my lucid dream only to find I was still dreaming so I just made myself fall asleep again and continued on with my lucid dreaming. I had 3 lucids before I accually woke up for real.

Yeah, I've had a few of them. Dreams are so abstract that it probably happens a lot. Didn't I just respond to this same topic? Deja vu.