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Quotes

Gale Weathers-Riley: Dewey, what's going on?

Sheriff Dewey Riley: That is not public information.

Gale Weathers-Riley: It's all over the Internet!

Sheriff Dewey Riley: It is?

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Mistakes

*SPOILER* When Jill stabs Charlie, the knife seems to make impact with his chest (directly in the middle). But then the close up he's bleeding from the heart (the left side *viewers right* of his chest). See more...

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When Deputy Perkins is pretending to be dead in the squad car, Deputy Hoss reveals Perkins' first name to be "Anthony". Anthony Perkins was the name of the actor who played Norman Bates, the killer in the original "Psycho". See more...

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Scream 4 (2011) - 9 corrections

Directed by Wes Craven, starring Courteney Cox, David Arquette, Neve Campbell (add more)

Genres: Horror, Mystery, Thriller

Comments made in brackets are corrections from other visitors. To submit your own corrections for mistakes, just click "edit" under an entry, then choose "correct entry". You can also submit corrections for corrections, if you think a mistake has been unfairly removed.

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Towards the end of the film when Kirby and Sidney are about to go to the basement, Kirby says something about her router being smashed, a few moments later it shows her iPhone screen and she is connected to WiFi. [The neighbor's wifi could probably reach her house.]
Edit
***Spoilers ahead*** The final sequence takes place in a hospital room in ICU. Jill pulled out IVs and electrodes that were attached to her, then proceeded to Sydney's room. She pulled the call button from the wall, then tossed Sydney around the room. Glass shatters. She knocked Dewey out with a metal bedpan, fired a couple of shots from a gun, and yelled at Sydney, Gail, and the deputy. Sydney even fired the gun at one point. All of this goes on for quite some time, making a hell of a racket in ICU. The problem? The medical staff. Any nurse at the nurses' station would have been alerted automatically when Jill pulled the electrodes off herself, and also when the call button was pulled from the wall. Within seconds there should have been someone come to the rooms to see why they were alerted. Yet the only time you see a nurse was when Jill hid just inside a door while making her way to Sydney's room. One walked past on her way somewhere as if nothing unusual was occurring. The subsequent fight occurs and you still don't see any hospital staff. So where were they? [It is not uncommon for hospital security to be rather lax, especially when there is a large number of patients in the building. Also, the scene takes place at night. There therefore would be a lot less medical staff on duty, reducing the possibility of us seeing any. At best, there may only be about 5 nurses on duty.]
Edit Corrected by THGhost
[Bit of a spoiler alert so don't' read any further if you haven't seen the movie yet.] At the end of the movie Sheriff Dewey tells the person who is the killer that Sidney is in critical condition and may or may not live but a few seconds later we see Sidney awake and alert and with enough strength to fight off the killer once again. [Anger and fear can be more than enough to gather enough strength to fight your way out of a difficult situation regardless of how much of a critical condition you are in.]
Edit Corrected by THGhost
In the film Dewey is called sheriff and has "sheriff" on his vehicle, however he also has "police" on his vehicle. Police officers and sheriffs are not the same thing. [Dewey may be working for both the police and as the sheriff for Woodsboro. It's not uncommon for a sheriff to do that.]
Edit Corrected by THGhost
If you have watched the rest of the Scream films you will know that Dewey was stabbed in the back in the first film which caused him to have a very noticeable limp during the rest of the original trilogy. In this film he walks completely normally. Even with modern day treatments he'd still have a little limp. [Whether or not a person can recover from a noticeable limp depends on the specific injury. All we know is that Dewey suffered a knife wound. Even a specialist in neurology would be incapable of determining the extent of the injury based on that little information. And this ignores that there are plenty of stories of "miraculous" recoveries, despite everything medical experts believe to be true.]
Edit Corrected by JC Fernandez
After Chloe stabs Rachel in "Stab 7", blood runs down her chin but in the next shot, her chin is clear of blood. [This is a mistake in a movie the characters are watching. "Stab 7" is a fictional film in the movie, so you can't count it as a "Scream 4" mistake.]
Edit
WARNING: Lots of spoilers! Throughout the entire movie, but mostly in the end, it's made apparent how much smaller Jill is than Sydney and the rest of the adult cast (watch her height and size compared to others, especially when she is laying next to Sydney at Kirby's house and the hospital). Charlie is shown to be the same height as Jill, most noticeable at Kirby's house when they kiss. However, in the scene where the cops are killed outside of Jill's house, the killer is taller than the cop. Not possible seeing as Jill and Charlie are both kinda small. [I wondered about this too, but then it occurred to me that Jill could simply have worn platform shoes whilst in the costume to make herself appear taller. This would help towards nobody suspecting her because, as you said, she is much smaller than Sydney.]
Edit Corrected by THGhost
After Jill's mom returns home from the store, she pulls a box of cereal out of the grocery bag and it is already opened. [She could have opened it in store and tried some or she could have picked it without looking at the top of the box, not realising that it had burst open.]
Edit Corrected by moviefan2345
In the end, approx 15 min before end the guy with the head camera goes to the balcony with bottle of light brown liquid but on the balcony he is drinking from the small (pocket size) bottle. [I just watched this scene and the bottle remains the same size throughout, it never changes.]
Edit Corrected by THGhost