I love lucid dreaming! I had one where I could fly, and it was so incredible! I actually flew so high at one point that the air was freezing and I remember recalling that I knew I was as high as airplaines normally flew. It was a dark, clear night and the stars were all out, and it was as if I was flying amongst them. It was such a beautiful dream. What was even "cooler" so to speak, was that taking off actually wasn't effortless. I could feel the pull of gravity in my dream as I lifted off from the earth, and I could feel how much energy it was taking to get off the ground. Simply amazing.