Corrected entry: When Kevin opens the window, he overhears Marv and Harry planning to return that night at nine o'clock. At this point, Kevin could have simply called the police and told them what was going to happen. The Wet Bandits would have been caught immediately.
Corrected entry: The entire plot relies on Kevin's parents being unable to call home to speak to their son, after the phone service to their house is severed by a falling tree (when the McAllisters are getting into the van a utility worker tells Mrs. McAllister that the power has been restored, but that the phones "are a mess" and that it will take several days to repair them, especially around the holidays). Kevin, however, is somehow able to call Little Nero's to deliver his very own cheese pizza; this is never explained. It serves no purpose but to set up the use of the "Angels with Dirty Souls" tape later in the film. If Kevin is able to do this because the phone lines have been fixed at this point (an argument supported by the fact that Mr McAllister is able to call and leave a message with a neighbour who lives on the same block), then this makes even less sense. Considering the mother is so desperate that she bribes passengers at the airport to secure a seat back from Paris, it is unlikely that the family do not continue to call the house on a regular basis.
Corrected entry: After Marv gets a nail shoved in his foot in the basement and instead of going back up stairs, he just decides to go back up the slippery ice stairs outside, why did he ditch the basement stairs, he could have gotten in the house a lot quicker without cutting his feet, all he had to do was look out for the nail.
Corrected entry: When Harry and Marv are watching the McCallister house during the day, Harry tells Marv to go to the back door to check things out. Hearing a noise at the door, Kevin plays the video tape with the machine gun shooting, and a stunned Marv falls backwards over the garbage cans turning them all over. Later that night they come back at 9pm to rob the house, but now the garbage cans are all standing back up again.Hawk
Corrected entry: When Kevin orders his own cheese pizza and has it delivered, Kevin has some fun with the delivery guy. He plays the video in which someone gets shot and killed. The pizza guy is obviously scared and runs away, believing that he is being shot at. Surely someone who thinks they have just been threatened by a gun would either call the police or investigate further. And if the police got a call of that nature, they would definitely check it out.
Corrected entry: When Marv gets shot in the face by Kevin after sticking his head through the pet door, there's a noticeable delay between when the gun's discharge hits his face, and his reaction.
Corrected entry: Despite what the airlines might tell you, there is no such thing as a fully booked flight - especially a long-haul flight like the one Mrs. McCallister is looking for. Two or three seats are always kept spare in case of emergencies (like this one) and, if not required, are given or sold very cheaply to airline employees. This practice is known as 'deadheading' and the staff in the U.S. Embassy in Paris would be well aware of it. One phone call from an embassy staffer and Mrs. McCallister would be on that flight.
Corrected entry: When Kevin's family arrives late to the airport on their way to Paris, the person at the gate doesn't check their tickets and their seats are waiting for them during the one of the heaviest travel days of the year. Normally, stand-by's would have filled up those seats.
Corrected entry: When Kevin goes to the market, he had one pack of toilet paper in his cart and as he heads through checkout. In the next scene, it shows him walking home with two bags. You can see that there are two packs of toilet paper (one in each bag).
Corrected entry: How would the robbers know exactly what time the lights were going on at the McCallisters' house? It is the first evening they are away from home; and even though Harry visited the house the evening before, he was not told the exact second when the timers were set and didn't leave the hallway to find out for himself.
Corrected entry: Why don't the McAllisters simply contact their local Police station (or have someone from the US Embassy do it for them) and have them arrange for Kevin to be looked after until one of them can get back?
Corrected entry: When Kevin prepares the house to defend it against the bandits, he pours water over the steps at the front door and on the stairs to the basement. The water freezes practically immediately. In a later shot, when Kevin is running from the bandits to his neighbours house, you see that the street is covered with puddles of (liquid) water.
Corrected entry: The McAllister's flight arrives at Paris's Orly airport. Orly is used for domestic/continental flights only. DeGaulle is Paris's international airport.
Corrected entry: After Kevin has been out of the house and said, "I'm not afraid anymore", it was night, but when his mom calls from Paris and they send a policeman to their house, it is broad daylight and Kevin is still under the bed cover.
Corrected entry: The burglars plan to rob Kevin's house at five o'clock. After he talks to the old man who lives next door, Kevin leaves the church and goes home to booby trap his house. The church bells ring eight o'clock.
Corrected entry: The family checks in to a United Ticket Counter, yet they fly an American Airlines plane.
Corrected entry: Kevin goes food shopping, He gets milk and detergent, obviously heavy items. Afterwards we see him walking home and the bags he is carrying break open. He is carrying them like they are light as a feather. Even when the milk falls, you can tell its an empty bottle.
Corrected entry: In the scene at the end when Kevin runs down the stairs to meet his mom, his hair totally changes in the next shot.
Corrected entry: In the scene where the robber steps on the ornaments as he comes through the window, as he stands up to walk, there are more ornaments than were in the previous scene.
Corrected entry: When Harry and Marv are swinging on the clothes line they hit the brick wall and it moves.
Corrected entry: In the scene where Kevin is sentenced to the third floor, you can see that the roof joists of this house are open and un-insulated, making this attic way too cold for use as a spare bedroom - something a resident of "Shermer, Illinois" and not southern California would know.
Corrected entry: When the Mom is in the airport trying to get a plane ticket, she offers an old couple her earrings and her rings and her watch, and they agree to take them for their ticket. At the end when she is hugging Kevin, she has her rings and her earrings on.
Corrected entry: When Kevin pushed Buzz and spills the milk, everyone rushed over to clean it up. Fuller runs over and gets stuck between the chair and the wall. Kevin's aunt runs over to Fuller, and she's maybe five feet away when the scene switches. It shows everyone cleaning up the mess. That lasts for about ten seconds then the scene switches back to Kevin's aunt and Fuller. She just got to him and takes him out from behind the chair. What was she doing for the past ten seconds?
Corrected entry: In the scene where Uncle Frank backs up into Fuller, you can see that Fuller braces for it.
Corrected entry: Electrical irons are bottom heavy so that they stand up more sturdily. How would Marv be left with the imprint of the top part when the bottom of the iron falls first?
Corrected entry: There was a blackout before the McCallisters' trip, but the automatic timer for the house lights went on as planned.
Corrected entry: When Kevin is running through the next-door neighbour's basement, there is a lot of water pouring down from the upper levels of the house into the basement (the burglar's had turned the taps on earlier on in the movie). Yet, when Kevin reaches the kitchen, the taps are turned off - where is the water supposed to be coming from?
Corrected entry: When Kevin's mother realises she's forgotten her son and decides to return, she takes a plane, but the plane which she arrives in later is totally different.
Corrected entry: Kevin's dad calls the neighbour's house and leaves a message. How can he when he and the neighbors live on the same block and the phones are supposed to be out?
Corrected entry: During the head count, Heather (the girl counting heads) counts herself twice-once at the beginning and then at the end. So even if Kevin was there instead of Mitch Murphy, there would still only have been 10 kids, therefore another kid had to have been missing.
Corrected entry: In the scene where Harry and Marv are in Kevin's neighbour's house, when Kevin's dad calls, Harry picks up the phone to listen to the message, and the phone is on the hook. It shows him listening, then he calls out to Marv, and the camera looks at Marv, then when it returns to Harry, the phone is off the hook.
Corrected entry: At the beginning, the mum is on the phone and right before Kevin jumps on to the bed, she was saying, 'No, we're not taking the dog, we're putting him in a kennel.' We never see a dog or any evidence of a dog in either this movie or its sequel.
Corrected entry: When the robbers return to the McAllisters' house and are scared off by Kevin's fake "party," why didn't they notice that even though lots of "people" were inside, no cars were parked outside the house?
Corrected entry: When Kevin is home alone, the phone lines are broken, so how could he order the pizza from Little Nero's?
Corrected entry: Kevin can manage to do the shopping, and work out how to use the washing machine; and yet he needed his mum to help pack his suitcase?
Corrected entry: Kevin sleeps in and doesn't get to go on vacation, but that night he was supposed to sleep with his cousin who wets the bed. If that kid had slept with him Kevin would have waken up with the kid.