Revealing mistake: In the scene where Chuck finds Bill in the morgue vault listening to the recording of Chuck telling him to shut up, take note of Bill's thumb on the rewind button of the tape recorder. You can hear the tape recorder rewinding to replay the words, "Chuck to remind Bill to SHUT UP" multiple times but Bill's thumb does not move at all until he turns the recorder off. (00:30:00)
Continuity mistake: After Chuck breaks the liquor decanter and the desk appears free of broken glass Bill says, "Chuck you've got to keep that elbow stiff." When the camera cuts back to Chuck the entire desk appears as it was pre-fight with nothing disturbed, including a now complete and unbroken liquor decanter half filled with liquid. (01:30:40)
Continuity mistake: When Bill and Chuck are riding in Bill's new ride and the camera is looking in through the windshield there are some items on the dashboard, notably a green box just off-center on the driver's side. When the view switches perspective from inside the car looking out the green box is now on the passenger side, but it is not a reversal of the film because the lanes of traffic are still correct. (00:01:00)
Continuity mistake: When Chuck prepares a glass of Alka Seltzer at his desk it is half full, just a Bill enters he takes a large, long drink and sets the glass down and you can see he drank at least half of what was in the glass. At the end of the scene he picks up the glass to finish it and there is now more in the glass than there was to begin with. (00:53:20 - 00:55:30)
Continuity mistake: When Chuck is at his desk and he hears Bill outside his office singing "Jumpin' Jack Flash" the swinging silver pendulum balls on his desk are all in movement. Yet just fifteen seconds later when Bill arrives they are at a complete standstill. Not enough time has passed for them to have lost their momentum completely. (00:14:25)
Continuity mistake: The bruise on Chuck's left cheek, sustained while being beaten by the thugs, is visible while being booked by the police and when placed in the cell but vanishes moments later when Charlotte arrives and spits on his face. It is also missing again when they are bailed out later that evening when Chuck says, "My life is over." (01:22:25)
Continuity mistake: When Belinda first sets out the breakfast foods onto the stove top, she then fusses with the window and decides to remove her robe and the camera briefly cuts to Chuck. When the camera comes back to the kitchen, the food on top of the stove has changed position dramatically. (00:36:55)
Other mistake: In the scene where Charlotte is in the bathroom and Chuck is trying to get her to come to bed, there is a shot of an alarm clock on a shelf above the bed. The time at the beginning of the scene is 1:03. The time never changes throughout the scene, even after Chuck goes to close the drapes and check the apartment. The clock is obviously a prop and is not plugged in.
Continuity mistake: At the beginning of the movie, when the two boys are playing basketball below Franklin's apartment, note the boy in the blue and white jacket. His red and white scarf is knotted off to one side nearly below his ear and then changes to below his chin between cuts. (00:03:00)
Continuity mistake: When we first see Bill swing on the rope at the club at the end he is barefoot. Also when he sits in the chair upstairs he is still barefoot. Then when he jumps and lands on the floor he is wearing red sneakers. He also has on the red sneakers when they leave the club. (01:36:30 - 01:39:30)
Factual error: When Franklin gets thrown out of the window his arms are tied to his side. While falling his arms are out as if flying, but when he hits the basketball hoop they are tied by his side again.