Being a big fan of MST3k, I've been subjected to innumerable horrors including Creeping Terror (about a wall-to-wall carpet from outer space that comes to life and eats middle aged people at their proms and hootenannys); Pod People (a Spanish ET rip-off about a lonely boy who befriends an abandoned alien boy who kills people); Merlin's Shop of Mystical Wonders (Oscar winner Ernest Borgnine narrates a story about Merlin moving to Mendocino to open a shop which sells beautiful jewels, rare books, and classic toys which are all possessed by demons which prematurely age people and murder children); and The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies!!? (the premise of which I feel is self-explanatory).
Really, MST3k's collection of cinematic train wrecks make Plan 9 From Outer Space look like Richard III. You haven't seen bad movies until you've experienced what Joel, Mike, and the 'bots have to offer.