Oh, please, none of the films mentioned even approach the un-watchable, boredom-inducing, brain cell-killing spawn of evil such as:
Night of the Lepus - a small western town is terrorized by....giant rabbits. Where are the French when you need them? Anyway, I think the giant rabbits are finally defeated by.....car headlights.
The Creeping Terror - unattractive extras terrorized by, well, a very slow moving shag carpet. The film was made without sync. sound. Just narration. That went on and on. For what seemed like hours, as the carpet remnant approached a car & the poor lovers inside could not escape. From a carpet. That moved about five feet a minute. Did I mention that many of the people in the movie actually paid money to be in the movie (instead of getting paid as extras)?
The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies - no film could ever live up to that title. Though the musical number, "Uh Ooh Wow Wow" almost does.
Rat Fink a Boo Boo - by the same writer/director of the previous film. I can not relate to you how mind-numbingly bad it is. Wait, I can. Makes the D&D Movie seem like, well, Peter Jackson's Lord of the Rings.
And honorable mention to:
The Terror of Tiny Town - not a genre movie for these categories, it still deserves mention as the first (and last) all-midget western. All I can remember is the one line (used twice): "Why, the low-down coyote!" With 'coyote' pronouned kie-ote. Well, it might have been "Why, the low-down varmint" but I really think it was "coyote." I just can't bring myself to watch it again to see what the line really was. And Plan 9 from Outer Space was one of the first movies I bought on DVD.