"The Day the World Got Really Screwed Up!" is the Halloween special of the animated TV series The Angry Beavers. It first aired on Nickelodeon in the United States on October 26, 1998.
Out trick-or-treating, the Beavers (Norbert and Daggett) go up to that scary house on the hill. In an unbelievable stroke of luck, it turns out to be the home of their B-movie star hero, Oxnard Montalvo. Their happiness is short-lived, however, when they discover the place is being taken over by a glowing space object that thrusts them into a wild "movie" that combines bits of every bad black and white sci-fi film that Oxnard ever made. In true B-movie fashion, it is up to the Beavers to defeat the monsters and return everything back to normal.