Deliberate mistake: Jim was sitting on a bench along the road and Amy [Brie Larson] walked by (several feet away), apparently not noticing him. (Jim was seated between other people.) Brie got into her car and adjusted the rearview mirror, catching sight of Jim on the bench. A driver would adjust the rearview mirror, if necessary in the first place, to align it with the rear window, not angle it to the right to be able to see the sidewalk. (00:51:34 - 00:51:55)
Factual error: The Royal Canadian Mounted Police officer who phones Jesperson to tell him he has not been accepted is a colonel. In common with most Canadian police forces, the RCMP uses British-style civilian police ranks (inspector, superintendent, etc), not military-style ranks as the American police do.
Revealing mistake: JR is in the weapon container of the crazy dealer, who passes him some of his goods. JR ends up holding in his right arm a MP5K and an M4A1, which combined are about 5 kilos, but then he passes him an M60 Machine Gun, which weighs over 10 kilos and that the relatively diminutive protagonist just handles throughout the scene gripping it with his left hand and making no effort whatsoever. (00:25:20)
Continuity mistake: When Nick is instructed to leave hotel room #700 Chord verbally tells him to "go outside and turn right." but the on-screen arrow points left and we see Nick turn left. (00:29:39)
Revealing mistake: When the newscaster was filming Clinton giving a statement, the timer on the camera stayed at 0:00. The red "Rec" button, which supposedly was on, also looked fake. (00:10:35)
Continuity mistake: At the end when Sarchie is hugging his wife, in one shot the bandage on his arm has unravelled. In the next, it is neatly wrapped.