The Rifftrax is the only thing that makes this film watchable. It doesn't matter that most of the riffs are no more than average quality (though I did nearly squirt soda through my nose at a killer "Val Kilmer" remark about halfway through.) You don't have to be a filmmaker to know that this script, photography, acting, continuity, and editing are so jaw-droppingly bad that you literally could make a better film in your backyard over the weekend. The last half consists of flashbacks, recounted by a rather whacked scientist. In one of the worst performances ever filmed, he tells his students the 'horrifying' tale that supposedly put a few of their peers into mental institutions. From that, you'd expect some kind of thrills, right? But except for the one-minute appearance by the titular character (who is not quite as scary as a dung beetle) the entire recollection is so completely devoid of action that it's as bad, or worse, than "Manos, the Hands of Fate." Friends, it's my duty to tell you that "Plan 9 From Outer Space" has more thrills, and better acting, than this wet noodle...but it IS riff-worthy, and suitable for shaking your head in numbed disbelief.