Other mistake: Before Jack's car jumps over the bridge, a van skids on the road. The first angle shows a thug firing at Jack, and the second angle shows Jack swerving to the left to dodge the bullets. The editing is all wrong here: The thug fires at the opposite lane to where Jack is, so he is really driving to where the bullets are.
Revealing mistake: When Arnie flips his car sideways to avoid the Texaco truck, the stunt driver is very obviously not Arnie.
Revealing mistake: When Slater jumps down to the next house to chase Benedict, you can see the face of the stuntman.
Continuity mistake: When Whitney points the gun at Benedict, her arms change position between shots.
Continuity mistake: During the car chase when Danny is in movie-world, Jack is firing the thugs and his hair moves a lot during the wide angle, but barely at all a frame later in the close-up.
Continuity mistake: When Benedict is getting away from Jack's daughter's house he gets into a white car, but when Jack shoots him the car is black.
Suggested correction: It's the same car the whole time. The car he gets into is black, but the way the camera picks up the light that hits part of the door does fade out of the color some, but you can see the rest is black.
Continuity mistake: When Jack is being chased and the guys in the red pick up truck are throwing dynamite at him, they throw one that hits a parked car just as Jack makes a hard left turn. The next shot has the car exploding and Jack having made a hard right turn.
Revealing mistake: After Slater jumps out of the house and it explodes, when the cop car flips over, the air ram used to flip it over is visible.
Continuity mistake: When Jack s shooting at the chopper from inside the elevator, its door has bits of remaining glass around the sides, which disappear from the chopper's POV. This changes back and forth.
Continuity mistake: When a prostitute walks to Benedict and opens her coat, when the angle changes her right arm and hand are in a different position, plus a guy is suddenly right behind her.
Continuity mistake: When Arnie's car is parked with the thugs in front, and he is pressing the gas pedal while Danny sits behind encouraging him, there's a wide angle of the car and Danny is completely gone, only to reappear in the next shot.
Continuity mistake: When Danny ties his mom's tie, her collar swaps from raised to lowered between shots.
Continuity mistake: When Vivaldi is interrogating Frank, the ropes around him are tied differently depending on the shot.
Continuity mistake: When Jack and Danny enter the video store a sign on the door reads Acme Video, yet inside there's a huge "Blockbuster Video" sign.
Continuity mistake: When Arnie drives towards the red truck, their distance to the boxes increases/decreases randomly with no logic whatsoever.
Continuity mistake: Jack is inside the elevator after the chopper has killed the mobsters. He's got glass all over him, but when the angle changes to a wide shot the bits of glass are gone.
Continuity mistake: When Arnie drives fast towards the thugs' red truck, the alley swaps from being sunny to being in shadows, back and forth.
Continuity mistake: Arnie heads for the funeral, crosses the road, the pond, and drives up a hill and stops. When the angle changes, two columns have suddenly appeared behind the car.
Continuity mistake: After Benedict is introduced, Frank's head swaps from turned to the left, next to the target, to centered, several centimeters away.
Continuity mistake: After Arnie electrocutes the baddie, Benedict aims a knife at him, and Danny pulls him away. Benedict's stunt double is noticeable because he is plumper, and his hairstyle differs.