I had my second lucid dream last night and it was around like 8 o'clock and I woke up around 8:10. Anyways in it I was in this room and I sort of just knew I was dreaming. Does this happen often? There wasn't any dream signs or anything I just knew. Also I went outside to fly and got a few feet in the air then fell back down. But then I turned around and tried to shout clarity but I just couldn't get it out and I felt weak. Is this what normally happens before we wake up?