Although Plan Nine is perhaps the most poorly-executed "professional" film I've yet seen, I don't consider the "worst" because it never fails to entertain me - it gets a laugh out of me every time. Now They Saved Hitler's Brain...THAT is a badly executed film (actually two spliced together) that as I recall bored the daylights out of me (as a teen, anyway - I saw it once 30-some years ago). I think the most boring span of time I ever spent in a theater, though, was in the Cleveland Cinematheque ca. 1988 watching " Mozart - Aufzeichnungen einer Jugend," a German art-house film that depicted an entire morning in the life of the child Wolfgang Mozart in more-or-less real time. This meant minutes-long shots of people sitting, riding in carriages without speaking, scribbling on paper without speaking, rowing boats without speaking, walking around, washing their hands, getting dressed...AAAGH! After the first two hours of this I left; I'm not sure if anything happened during the second two hours but I couldn't bear to stick around to find out. I really liked the Johnny Depp Ed Wood film as well, BTW.