Continuity: The plane they are on changes several times throughout the movie. When it is sitting at the gate in Dallas, and while being pushed back from the gate, it is a Boeing 737. When it is shown taxiing out, it is an Airbus A320. Air to air shots are of a Boeing 767, which is also the same as the interior shots all throughout the movie. The 737 and A320 are narrowbodies, while the 767 is a widebody, commonly configured 2-4-2 like the interior in the movie.

Revealing: When Lisa stabs Jackson in the throat with the pen, if you watch closely, you can see that she is still holding the pen when she pulls her arm back, but in the entire rest of the scene the pen is still stuck in his throat. If you watch it in slow motion, the mistake becomes even more obvious.

Continuity: When Lisa is on board the plane, she is wearing stiletto heels (best seen when she is collapsing in the bathroom). However, when she is running through the airport, she is wearing flat shoes. This is most easily seen when she comes of the transporter belt, when she trips and one of her feet swings into the air. Later, when she kicks Jack on the stairs of her house, she is wearing stiletto heels again. Submitted by Twotall

Continuity: When Lisa and Jackson are having their first conversation while waiting in line at the airport, a strand of her hair gets caught in her mouth. When the camera changes angles, the hair is no longer in her mouth. Submitted by Jon Nicholas

Continuity: After Lisa pretends to be reading a magazine to avoid the security guards who're looking for her near her gate, she spots Jackson and you can see two men sitting at a table eating lunch in the foreground of the shot. When Jackson sees her and starts running after her, both the table and the men are gone (Jackson runs through the place they used to be).

Continuity: After Lisa kicks Jackson, her shoe gets stuck in his leg. In the next scene (in the bathroom), she is barefoot and has had no time in between these shots to take the other shoe off her left foot.

Continuity: The ka-bar knife Jack takes from his dead associate, goes from having a dull, black blade (best seen when he tries to pry the door open with it), to a regular, shiny steel one. Submitted by Twotall

Continuity: When Lisa is changing her top in the bathroom you see the cut on her chest and it is red almost as if it was only recently done or had been bleeding. Later in the film when Jackson is in the bathroom and he sees the scar it is healed up and there is now a fully healed scar. There are two problems, firstly the cut could not have healed in the few hours between when we see it. The second is that the cut we see at the beginning was said to have been caused two years prior. Therefore how could the cut be that fresh? Submitted by Lummie

Revealing: When Lisa kicks Jack causing her shoe to stick into him and for him to go falling down the stairs, you can see the face of Jack's stunt double. Submitted by Disney-Freak

Factual error: The timeline for this film is incorrect. The flight Lisa takes is a red eye from Dallas to Miami. Non-stop flights between those cities takes 2 1/2 hours. Even with the west to east time change, this isn't long enough for a red eye. Shortly after take off, the clock in her father's house reads about 11:15pm. The plane lands after sunrise in Miami.

Continuity: At the beginning of the film when Cynthia is talking to the two hotel guests, if you watch closely, the man's shirt is buttoned up to the top, and in the following shot the top button is undone. Submitted by The-Immortal

Continuity: When Cynthia serves the snooty customers, there is a little window on the computer screen which appear/disappears/etc.

Continuity: The number of credit cards the man pulls out of the wallet at the start of the movie changes between shots.

Continuity: When Lisa stabs the pen into Jack's neck, she stabs him in the side of his neck, however, when they show the pen and from then on, it's in the middle of his neck. Submitted by Lummie

Revealing: When Jack is falling down the stairs, you can see a pad on his back.

Continuity: After Lisa manages to steal a car away from the couple at the airport, we see her try to make calls from Ripner's cell phone. After the cell phone blinks "Low Battery" for the first time, we can see that she is wearing a seat belt. Lisa then swerves to miss an oncoming car, and we see her hastily fasten her seat belt, as if it was never fastened before.

Revealing: After Lisa has escaped from the plane, she is spotted by Jack and is getting chased by him. When she runs through the travelator she trips over at the end and it is obvious that it is a stunt woman, and not Rachel McAdams. She looks nothing like her.