Continuity mistake: After Nick lets go of Toomey's nose, Toomey is shown placing his left hand over his nose. When the shot cuts, it is now his right hand placed over his nose. (00:17:00)
Continuity mistake: Just after Brian and the airport manager walk out of the terminal, they walk into the lobby area and the manager tells him "Looks like a full flight." When the manager says this, he puts his hand on Brian's arm. But in the next shot, his hands are at his side. (00:05:35)
Continuity mistake: When everyone begins walking to Bangor Airport, in the wide shot Brian is behind the rest of the group. When the shot cuts, he is suddenly ahead of Gaffney. (00:58:27)
Continuity mistake: After Laurel picks her bag back up after bumping into Nick, when the two share a glance and the camera is on Laurel, she has one hand against her shoulder. When the shot cuts, both her hands are away from her shoulder. (00:03:20)
Continuity mistake: When Nick is speaking with his associate about the next target, just after Nick tells him he won't do it, the associate is shown leaning toward him slightly so that he can grab onto him. The associate stays in this position when he gives Nick the envelope, until Nick gets out of the car, where the man leans back into his seat. When the shot cuts, the man is leaning toward Nick again. (00:01:43)
Continuity mistake: When Dinah is trying to explain that something is out there, Brian says to her it's just her imagination. Nick is shown next to him with his right upper arm at his side. Cut to Dinah, and Nick's right upper arm is suddenly extended slightly due to his hand being placed on his hip. (01:09:50)
Continuity mistake: In the cockpit, after Brian fails to make contact with Denver, he tells Albert to look out the left side of the plane. Albert then leaves the cockpit and Bob turns his body 90° to the left so that he can see Albert walking away. When the shot cuts back to Brian, Bob is positioned directly forward. (00:21:47)
Continuity mistake: When the surviving passengers are standing on the runway after arriving at the airport in LA, they are shown looking around and there is a shot where Brian turns his head to the left slightly. The shot then cuts to Laurel, and Brian is suddenly looking slightly to the right. (02:52:30)
Continuity mistake: When Toomey's father is telling Toomey to tell the board room that he lost the money and that it was a mistake, in the shot from behind Toomey, his hands are placed flat over his ears. When the shot cuts back to him, it is now the sides of his hands over his ears. (02:10:41)
Continuity mistake: When Toomey is about to tell the board room how much money he made, he says "I didn't make any", before being interrupted by his father's voice. He grabs onto the side of his head and points his head downward slightly. In the next shot, his head is suddenly pointed down further. Then in the shot after that, his head is back to its original position. (02:10:35)
Continuity mistake: When Dinah projects the image of the board room into Toomey's mind, there is a moment where he trips over a few meters away from Albert and Bob. After Dinah tells him to keep running, there is a shot of Toomey continuing to run. But a couple seconds after that, it's shown that he hasn't even ran past Albert and Bob yet, even though he wasn't far from them a couple seconds ago and kept running. (02:09:10)
Continuity mistake: When Albert is explaining to Nick how Toomey killed Gaffney, in the shot where he says "If I'd have walked in first he would've killed me instead", he is looking straight forward. When the shot cuts, Albert is suddenly looking at Nick. (01:53:25)
Continuity mistake: When Bethany meets up with Bob, and they wonder where everyone is, Bethany is shown putting a cigarette in her mouth. The cigarette is straight and unbent when she places it in her mouth, but in the next shot, the cigarette is suddenly bent slightly. (01:52:20)
Continuity mistake: When Albert strikes Toomey with the bag for the last time, in the shot of Toomey turning around after getting struck, Albert is holding the bag with his left hand. When Toomey lands on the ground in the next shot, Albert is suddenly holding the bag with both hands. (01:49:18)
Continuity mistake: After Nick has finished explaining to Dinah that he has to get the blade out, in the close-up shot of Dinah while Nick says "Fold those two table cloths", Nick has his hand on top of Dinah's head. In the next shot, his hand is away from her head. (01:46:30)
Continuity mistake: When Dinah starts walking over the cafe counter to find Toomey, Rudy can be seen behind with his hands at his side. When it cuts to a wide shot of the cafe, he is suddenly holding onto back of a chair with his right hand. (01:41:52)
Continuity mistake: Dinah, Laurel, Bethany, Gaffney and Rudy go into the cafe to find Toomey no longer there. When Dinah deduces his location, in the shot of her saying "Behind something", Bethany can be seen behind Dinah, in between her and Gaffney. Gaffney then walks over to her and Bethany cannot be seen. When the shot cuts again, she can be seen behind Gaffney and should have been visible in the previous shot. (01:41:47)
Continuity mistake: Brian tells Albert to crack open a can of soda. In the shot of him holding the can, whilst he uses his right hand to crack he has two fingers from that can, pressed against the side. Then there is a close-up of the can opening and those two fingers are now curled against the side. (01:39:58)
Continuity mistake: When Albert lights the second match, in the close-up of his hand, he has the match placed between his thumb and index finger. In the next shot, it's between his thumb and middle finger. (01:37:50)
Continuity mistake: When everyone is wondering what to do, Gaffney walks up to Brian and asks him what they do now. In the shot of Gaffney walking up to him, Brian has his left hand on the left side of his face and right hand on the right side. It then cuts to a close-up of Brian where his left hand is now on the right side of his face. (01:34:25)
Answer: In the book he slaps her across the face during a heated argument. I can only assume that is what he is talking about.