The Back to the future fly through the sky shot was actually taken from another movie(Ironic, eh?). I checked the commentary and, it's taken from the Clint Eastwood movie Firefox. If that's on DVD mabye that is sans credits. I personally think that it wouldn't work because, it is a flying through the sky shot and, not a look up clouds cover the sun shot. Oh, wait mabye the shot when the sun appears after the rain when the doc is looking up just in reverse. Also, if you liked those pictures I could dig up a ton more for you if you want to use the promo images.
