yeah, I think I remember reading something like that; something about air pressure directly in front of an opening being lower, due to the air molecules bouncing off of the surfaces around the hole.....but the only thing is that if you think about it, aircraft use the same methodology, and it seems to work (e.g., jet fighters, with intake openings at the front of the plane). I know that they travel at a much faster rate, but shouldn't the same principle apply ? Then again, maybe it depends on the size of the opening.....