I just finished watching the MST3 episode of It Conquered the World (#311). OMG, this one was one of the best so far! The movie is atrocious of course, but they did an excellent job of riffing this one. There is also a short about snow activities that is frickin' hilarious! If you are MST3 fan, you should definitely check out this episode.

P.S. Probably THE worst movie monster in the history of crappy movies!!!