Being able to control your dreams, a subject brought up a lot in the movie "Waking Life", an artistic look into dreaming and death.
They say you can tell if you are dreaming by flicking a lightswitch. If you are dreaming, the light will never turn off. In lucid dreaming you can fly about, cause havoc or fornicate with all that you please.
Lucid dreaming is basically dreaming while being aware that you are dreaming.If you are in a lucid dream, you will usually have some power over your dream - anything from being able to fly or making an object or room appear behind a door or inside a pocket right up to being able to change into animals and create a whole world! Lucid dreams have been scientifically proved to exist.
Last night I wanted to fly, and I flew. And I was in total control of it.