Continuity mistake: Just as Gavin's and Doyle's cars collide on the FDR, the right (viewer's left) side-view mirror on Doyle's car breaks off, but is then intact and broken again in following shots. (00:08:10)
Continuity mistake: Just after Doyle's car hits the sand-filled barrels, in the shot facing Gavin in his car, Doyle is seen in the background having removed his seatbelt, but in Doyle's next close-up he is still buckled and proceeds to remove the seatbelt again. (00:08:15)
Continuity mistake: When Doyle's car hits the sand-filled barrels, the front tire has a rather small hubcap and the back tire's hubcap is a different style and quite larger. A moment later, when Doyle inspects the damage to the car, in the close-up the front tire now sports an identical hubcap to the back tire. (00:08:20)
Continuity mistake: When Doyle and Gavin collide on the FDR, Doyle's car hits the sand-filled barrels and ends up at the center of the chevron stripes on the median island, as seen in the overhead shot. When Gavin has the second accident, he walks over to Doyle's disabled car which is now at the right of the chevron stripes, closer to the exit ramp. (00:08:20 - 01:02:50)
Continuity mistake: After he misses his court appearance, when Doyle pleads with Valerie as she walks out of the courtroom, his left hand holds all the papers and folder, but next shot his left hand is empty and his right hand now holds everything. (00:17:00)
Continuity mistake: After Ben Affleck sets the sprinklers off in his office, his suit is drenched. As he exits the building minutes later, it's completely dry. (00:46:30 - 00:48:00)
Continuity mistake: In the daytime restaurant scene between Ben Affleck and his wife, the wife tells Ben Affleck that they are going to dinner that evening with two friends, one of whom is Carl and other a woman. However, later that evening the dinner date is with the wife's parents. The wife's father's name is Steve, not Carl. (00:58:15)
Continuity mistake: After Gavin's second accident on the FDR there is a cut on his nose and another on his cheek. The characteristics - such as severity, size and position - of these cuts keep changing in the following scenes. (01:02:00)
Continuity mistake: In the courtroom, Gavin puts down two files. One orange, one blue. In the next shot the files are black and blue. The next time they're in the courtroom and Terry mentions Gavin's accident the folder is orange again then gone altogether.
Continuity mistake: When Ben Affleck is in court, he is playing with his wedding ring - the very next shot is him with his hands tother.
Continuity mistake: When the kid on the bike throws shredded paper in Affleck's hands, the paper is in the kid's left hand. Then when he throws it in Affleck's hand, it is in his right.
Continuity mistake: During the events on the first day you see Ben Affleck wearing laced up shoes and then as he is stepping out of the car in the rain, he is wearing loafers. Where did the laced up shoes go?
Continuity mistake: After Affleck's car strikes Jackson's and comes to a halt, an overhead shot shows his driver's side door only a few inches away from the plastic barrels in the median. In the next shot, Affleck opens the door a couple of feet, enough to exit easily. The median barrels are filled with sand. It would be impossible to push them away with a car door.
Continuity mistake: Early in the film at the first accident, Gavin's Mercedes comes to a stop with the left side of the car up against the barrels. But magically, in the next shot Gavin is able to open the driver's door and get out of the car.
Continuity mistake: At the bar while Doyle is about to drink the whisky and and calls his friend, the amount of liquid changes between shots.