 There were two alternate endings to the movie. Both endings took  place In the final scene after Freddy was blasted by the Denver  Ghostbusters through a wall (before the trap was used). In one  ending the Ghostbusters figured he was taken care of easily, and  didnt bother to trap him. Immediatly there was a knock at the door.  Eugine opened it hoping for Girl Scouts to sell them cookies,  instead it was Freddy who came in and killed the three. The second  alternate ending involved a song and dance number with Freddy and  the Denver Ghostbusters singing "The Safety Dance" by Men Without  Hats.