i never had any falling dreams either, but i think it would be pretty awesome - vid realted why i think so http://www.youtube.com/watch?v=bWsjlFB9l5Y
closest thing i had was in the stairway that goes down from my flat - i was moving down the stairs, falling so slowly that basically i could get down the entire stairway without touching the ground if i caught the bars and used them to turn around to the next few stairs
i also had dreams of flying as a kid, but they were very very slow, like i had to concentrate and do these weird moves to keep me in the air. highest i could fly was roofs of some buildings, and it took a lot of time, but was worth so i did it.
guess overweight kids move slow even in dreams, right?