I found an interesting site about film recently that has a page devoted to allegedly real paranormal activity captured by accident during the making of five films/shows. I think some of these are probably easily explained--The Wizard of Oz in particular, which, in the Blu-Ray restored version, clearly shows the anomaly to be a live crane walking and preening in the background, not a swinging noose with a munchkin in it (which, even to describe as I just did, sounds laughably dumb :D).
http://www.cafemom.com/articles/entertainment/145271/5_movies_that_have_actual?utm_medium=sem2&utm_campaign=prism&utm_source=zergnet&utm_content=0
Nice website Karl.
Here is a film that I believe relates aliens with fallen angels and/or demons and their works.