Corrected entry: When the first shot of the rigged rope is shown outside of the upstairs window, the rope appears to be horizontal. Yet, when Kevin rides down it, the rope appears to now be sloping downward towards the treehouse.
Corrected entry: The morning that Kevin wakes up looking for his family, his hair changes in each scene and stands up straighter on top.
Corrected entry: When the family is rushing all over the house because they're late, they show Brooke coming down the stairs and Heather going up the stairs. Then the scene goes to Mitch Murphy and then comes back to the family rushing. The scene shows the same shot of Brooke and Heather going down and up the stairs. (00:13:50)
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. (00:45:50 - 00:47:25)
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 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?