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Stupidity: A zombie is climbing up the apartment wall and is almost at Aidan's balcony railing. Instead of trying to push the Zombie off while he had the advantage (and there was a surfboard on the balcony that could have been used), Aidan ran inside and locked the door to the balcony. This furthered the plot and added excitement by having zombies coming at Aidan from multiple directions. (00:43:09)

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Other mistake: The location of snow that accumulated on the porch cover or deck does not match the way snow accumulated on the SUV. The higher roof plus direction of the snowfall would have kept that part of the porch/deck sheltered from snow. (00:00:41)

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Other mistake: The scraping sound is not coming from the man "scraping" his windshield. The snow is easily brushed off and there is no icy coating below the "fluffy" snow to realistically produce the sound of scraping ice off a windshield. (00:00:35)

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Continuity mistake: The final classroom scene contains some continuity errors. The podium is closer to the board/wall a couple times and is later at an angle instead of being parallel to the wall. The words Lucas wrote on the board - "I have not deserved this" - is in bolder/darker writing during the fight and the word "deserved" is not underlined after Lucas underlined it. There is also no explanation or even hint as to how the detective knew to go to Mr. Butler's class (or the school in general) that night. (00:12:25 - 01:19:18)

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Character mistake: Detective Spitzer went into Harper's dark/unlit house, saw his partner Greg on the floor, and then saw Alec standing in the kitchen. Without identifying himself, telling Alec to drop his weapon (pistol pointed toward the floor), or bothering to determine what happened, Detective Spitzky shoots Alec. (01:27:08)

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Factual error: Russell said he served twenty-one years in prison because his last offense - possession of 30 grams of marijuana with the intent to distribute - counted as his "third strike" under California's "Three Strikes And You're Out" statute. When he was on the internet trying to locate his father (instead finding his obituary from 2001), information on the computer indicated it was now 2012. This would mean Russell was incarcerated since 1991 - and further indicates he was sentenced about three years BEFORE California's "Three Strikes And You're Out" statute was implemented. Also, 30g of marijuana is the limit for "personal use", so he wouldn't have been charged with intent to distribute. (00:16:15)

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Other mistake: In the schoolyard scene where the bullies take Oak's notebook, a large mural-like backdrop (parrot, beach, ocean, and dolphins) changes location and is brought closer (becoming bigger and more obvious) at least two times. (00:16:00 - 00:17:10)

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Continuity mistake: Grandpa squeezed the mustard bottle, aiming at and hitting the center of Peter's pants where the zipper or "fly" is, plus some mustard landed on his shirt. The stain starts off covering a pretty large area, then shrinks to half the size and moves further right. (01:13:59 - 01:22:59)

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Continuity mistake: When Grandpa lifted the lid off the dumpster, it was close to full (all but a few inches to the top). When Grandpa and his friends throw the bully into the dumpster, no garbage could be seen at first, then the garbage was several inches lower than it was. (01:10:40)

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Continuity mistake: In the locker room, an adjacent locker is closed then open with a yellow shirt hanging inside. Also, Ali takes a uniform jacket out of the locker Borz said she could use and holds it in front of her while they were talking. When they're almost done, Ali is turned around toward the locker and starts to remove a uniform jacket from her locker (as though this is the first time she was seeing it). (00:10:52 - 00:11:35)

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Stupidity: While in Romania, Ali was a marine sergeant who was able to single-handedly take down multiple villains approaching from all sides by accurately firing one shot per villain and using vehicles for protection. At the Carrington Hotel in New York, Ali and villain Borz run toward each other while repeatedly firing their guns, to no avail. They meet in the middle, Borz knocks Ali onto the floor, then waits until Ali stands up before resuming the fight. A little later, Ali is on the floor again and tosses a hand grenade toward Borz's feet, and Borz just stands there and gets blown up. (01:28:18 - 01:28:51)

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Character mistake: NYPD officers have their guns drawn toward the elevator in the Carrington Hotel. When the door opens, Borz, wearing an unbuttoned Carrington jacket - but not the hat or white gloves that the doormen wear - is told by an officer to "hold it" and states that he's "just a doorman." The officer backs up and allows Borz to leave. A police officer would not simply accept the word of anyone in this situation. The person would be handcuffed and detained until the situation is under control and the police determine he was not (or was) involved. (01:24:41 - 01:35:02)

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Continuity mistake: The color of Lance's clothes change from a dark tan, brown, or grayish color on the train to blue walking through the train station and riding to Jack's place. Lance also has his jacket on the entire time - until he is at Jack's front door (where the jacket is no longer visible). Jack kept his coat on in the car, his apartment, and to play cards. (00:03:44)

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Continuity mistake: The sizes, locations, and smoothness of the pieces of glass remaining in the wall mirror after Aidan smashes it with a bat change. Initially, there were a few large and several smaller jagged-edged pieces around the top and upper-half of the right side. Later, there were four relatively large smooth-edged pieces spaced around the upper half of the mirror - one in each upper corner and one on each side at the middle. (00:15:48 - 00:19:33)

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Trivia: Tommy Ragen ("Oak") is a 12-year-old music/guitar prodigy who has already released three albums.

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Trivia: "Vaughn" is played by Levi Dylan, Bob Dylan's grandson.

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Continuity mistake: The view of the restaurant and other businesses along the same street are quite different when Pedro exits the restaurant compared to a little earlier when Emma brought Oak the guitar. Store fronts are not the same, the position of a garbage can changes, the restaurant has some outdoor tables and umbrellas, and there are brick borders around the trees and garbage cans. (00:12:34 - 00:14:18)

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Other mistake: After Emma gives Oak the guitar, and they sit on the step, the background changes and is noticeably a prop. The stairs up to the apartment are no longer real, but a vertical replica (and not a very good one). The position of Emma's scooter also changes from being parallel to the building to about a 45° slant and the handlebar no longer reaches the lights around the window. (00:12:55 - 00:13:19)

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Other mistake: Vaughn was sleeping in the back seat of the van with his head leaning on Gina's shoulder. When the collision occurred, his body somehow straightened up and went head first between the front bucket seats, through the front windshield, and he was ejected/killed. Based on his sleeping position in the van, he should have rolled forward and been kept in the back seat by hitting the front seats. A sleeping person is also less likely to be injured/killed because the body doesn't stiffen preparing for impact. If the accident actually happened as portrayed in the movie, Vaughn's body should have had visible cuts and be covered in blood, not just have a small amount of blood coming out of the side of his mouth. (00:07:53)

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Character mistake: Two EMTs took Alec in a stretcher to the ambulance, apparently without first attending to his gunshot wound, inserting an IV, giving him oxygen, or doing anything else that a first responder would do for an injured person. (01:27:48 - 01:30:18)

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