Lucid dreaming is when you have a dream where by you know your in the dream. In a lucid dream you are consciously aware of the dream and that it is a dream. You can do some amazing things when you realize your in a dream. Lucid dreaming is an amazing journey into the potentials of the dream world. You can breathe under water, you can fly and you can control every aspect of the environment in the dream just by thinking or willing it to change. The trick however is to know that your in a dream and fully believing in your control of the dream.