Best horror movie mistakes of 1985
Revealing mistake: When Jesse is cleaning out his room, he puts a tape into his tape player, and presses a button down on the top of it. But halfway though the scene of him packing his things away, you can clearly see the button is no longer pressed down, yet the tape still plays.
Continuity mistake: In the beginning, when the two shuttles have docked together, one of the NASA astronauts inserts some kind of key into the door and begins to turn it. When he does you hear a ratcheting sound, however, once the door begins to open and there's a shot from the inside of the uninhabited shuttle, the astronaut isn't holding any type of tool, and still the ratcheting sound can be heard as the door opens further.
Continuity mistake: Near the end when the vampires are trying to get into the crypt and Jim Carrey has locked them out, we see two vampires trying to enter the room through one door and others going around to get in through the other entrance. When they get in, the vampires have reversed which entrance they were trying to use - the ones who stayed at the first door enter through the second door and vice versa.
Other mistake: It is stated at the beginning of the film that the events that take place start in the spring of 1976, and span over the summer. The Climax, and final scene of the movie, take place on Halloween night. In the scene directly after Milt Sturmfuller was killed, the gas station attendant is seen reading about the slaying in the local newspaper. The date on the paper is Friday September 8, 1980.