Goofs for
Halloween H20: 20 Years Later (1998) More at IMDbPro »

• Continuity: The newspaper clip shown during the opening credits, which states that Laurie Strode died in a car accident, says that she was a survivor of the "Halloween murders" of 1968. They took place in 1978.
  
  
• Incorrectly regarded as goofs: While the porch light of Nurse Marion's home is broken, the electricity is not off when Jimmy goes in; Michael cuts the electricity after Jimmy leaves.
  
  
• Revealing mistakes: Strings are barely visible holding Adam Arkin up as Michael is killing him.
  
  

• Continuity: When two of the characters are watching Scream 2 (1997) on TV, the movie skips about 5 to 10 minutes in 5 seconds.
  
  
• Incorrectly regarded as goofs: Laurie drops a knife after stabbing Michael, but a moment later a knife is still in his chest. She had two knives.
  
  
• Continuity: Bottle cap on the bottle that Keri hands Will.
  
  
• Continuity: Laurie removes the top from a vodka bottle, guzzles, hands the bottle to Adam who also takes the top off.
  
  
• Incorrectly regarded as goofs: The police investigation at the start of the movie is never mentioned again, but it was in a different jurisdiction.
  
  
• Miscellaneous: In the opening montage, one of the newspaper clippings says 1968 instead of 1978.
  
  
• Continuity: The porch light at Jimmy's house switches from on to off numerous times.
  
  
• Factual errors: An ice skate through the face would not be a clean stab, it would shatter the skull.
  
  
• Continuity: When Laurie/Keri is driving away in the coroner's van with Michael in the back the Coroner written on the side of the van disappears and reappears repeatedly.
  
  
• Continuity: Near the end of the movie, when Laurie is driving away with Michael in the back of the coroner's van, it shows her going around the same turn in the road twice.
  
  
• Continuity: When Sarah is climbing out of the dumbwaiter, Charlie's head changes directions several times.
  
  
• Continuity: The look of the mask changes back and forth for the scene where Charlie gets killed upstairs (the original mask was deemed unsatisfactory after principal photography was complete and some, but not all, scenes involving the mask were re-shot).
  
  
• Continuity: A yearbook page with Laurie Strode's picture on it is shown toward the beginning of the film. Above her picture it says "Class of 1978." But if she were in school in October 1978, then she wouldn't normally have graduated until the following spring, in 1979. So therefore, she is Class of 1979.
  
  
• Continuity: In the classroom on the blackboard, the spelling of W.B. Yeats' name changes from the (wrong) spelling "Yates" to the correct "Yeats."
  
  
• Continuity: The level of wine in Laurie's glass changes inconsistently during lunch. The glass also jumps back and forth from her hand to the table between shots.
  
  
• Crew or equipment visible: When Laurie, John and Molly are running away from Michael to the car, John is pushed into the back seat, when the door is closed, a very bright stage light is reflected into the window.
  
  
• Continuity: When John and Molly first see Michael they run out of the kitchen and climb out through a window. Molly climbs out first then John, who goes out head first. When we see him from the outside, he is climbing out the window feet first.
  
  
• Audio/visual unsynchronized: After Molly hits Michael in the face with the rock and runs away, Michael looks up. It is clearly a different mask.
  
  
• Revealing mistakes: When Michael hangs from the pipe at the school, Laurie's wound is visible before he stabs her.
  
  
• Continuity: When Sarah is riding up the elevator along with the dead Charlie his eyes are open and he is facing forward. In the next shot his eyes are closed and he is facing to Sarah's side.
  
  
• Continuity: When the Van pins Michael Myers to the fence in the long shot just after the crash the engine bursts into flame. In the close up when Laurie Strode/Keri Tate is talking to Michael before beheading him there are no flames.
  
  
• Continuity: When Michael Myers crashes through the window with the knife in his chest the knife is sideways as if tucked under his jacket, when Laurie Strode/Keri Tate inspects the body in the next scene it is as it should be, vertical as if thrust into the body
  
  
• Continuity: When Michael gets pinned to the tree trunk, his back is up against the tree. But when Laurie comes along, all of a sudden his back is against the van and he is leaning over the trunk.
  
  
• Audio/visual unsynchronized: In the opening scene, a woman holds up a knife before she stabs it into a pumpkin. There's a sound effect of the knife coming out of its holder, however, the knife is in the air the whole time.
  
  
• Continuity: Toward the end of the movie when Laurie stabs Michael with the flag, look closely at the mask in the next few scenes, it's a different mask.
  
  
• Revealing mistakes: When Laurie is driving the van with "Michael" in it, notice in the long shots the road is solid pavement or concrete, a very "beaten path," however inside the van if you look outside the back window you can see the road is in excellent condition and has the yellow stripe down the middle separating the lanes.
  
  

• Revealing mistakes: SPOILER: Near the end of the movie, when Michael has fallen down onto the table, watch as Laurie removes the knife from his body, it is very clearly plastic and not well embedded.
  
  

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