I used to Lucid dream when I found that its one of the technique to achieve Astral Projection easily.
I recently had a Nightmare I was very scared and woke up, After that I went asleep again. I was on a dream in which I was doing some work in home. Suddenly I got realized that I'm dreaming , the next moment I woke up & My mom was near to me, so I started telling My mom that I had A Dream & Blah, Blah, Blah.. Soon After that, again I thought I'm still in a Dream and suddenly my mind went blank on how to find that I'm dreaming or not, This time I didn't get Exited, I started doing some Reality Checks to Know whether I'm dreaming or not, I started Biting my finger, I didn't get any pain, Still I'm not convinced, I banged my head with my hand, I finally confirmed that I'm in a dream. All of a sudden I again woke. I was confused that I'm still in a dream and I banged my head once again, It hurts. Finally Reached to reality.
When I finally Reached to the reality I thought that I was struck in a dream for more than half an hour, But I had seen the time when I woke After the Nightmare , It Was not even 5 minutes in that dream.
I felt WOW :)
Dream Within a Dream Looks Awesome :) !!