Continuity mistake: Luke McNamara is handcuffed behind his back at the police station but as he is loaded in to the ambulance he mysteriously is cuffed in front. [The handcuffs inside are normal police issue handcuffs and outside as he's getting into the ambulance they're attached to a belt, normally used for criminals they consider dangerous.]
Continuity mistake: When Ray gives his girlfriend the present right at the start, her bag moves up her arm when the shot changes. (00:01:10)
Continuity mistake: After they rescued Pierre Niéman, Kerkerian and Fanny out of the avalanche, they put an O2-mask over her face. The strings of the mask were full of blood - even before they touched the bloody face of Fanny.
Continuity mistake: During the scene at the festival, note the guy with the long hair, round sunglasses, and a purple & gold silk indian shirt. 1st seen bottom left corner, when the camera pans to the actor's view. Then watch how many times he shows up. In front of, behind, just about everywhere. In fact on the day of filming, he was awarded 'extra' in most scenes. That was by the film crew, before any editing, and was given Dave Stewart's hat for his trouble. Submittted by the extra himself.
Continuity mistake: Harry stands on top of a building with a girl folding paper planes. The plane they fold is folded with a blunt front. He throws it off the building and then the plane flies, all of a sudden the nose is sharp, this is visible. (00:12:10)
Continuity mistake: In the gas station scene after Ellen learns that Phil has drowned, she is so distraught she forgets to put the gas cap on and we can see it on the roof of her car as she drives away. But when she arrives at the police station we can see that the gas cap is on. (01:10:20)
Continuity mistake: When Gene Hackman is helping his wife zip up her dress her hair goes from hanging straight down her back, to being over her shoulder. It cuts without giving enough time to assume that she moved her hair.
Continuity mistake: After the doctor stitches and dresses his own eye, blood disappears, reappears and gets bigger and smaller through the dressing.
Continuity mistake: When Monster is reading the love letter to Rudy in the trailer of the semi, when Monster opens it up initially, the letter is folded in fourths (halves down the middles), when they come back to him in the shot, the letter is folder into a tri-fold (like a normal letter would be folded).
Continuity mistake: After his conversation with Leo, Willie presses the dial/talk button on his cordless phone and the light remains on. (00:59:40)
Continuity mistake: 1st shot: Chopper's girlfriend leaves the car; the headlights are on. 2nd shot: Chopper leaves the car to go up to her stoop to talk to her (through a closed door) and after she refuses him, he runs back to his car (old-school vehicle, far before the advent of headlights that turned themselves off) and 3rd shot: the headlights are OFF.
Continuity mistake: When Travolta is in the back of the Sno-Mobile truck with the kid, it shows them from the front looking out at the snow falling, and the kid crosses his arms. Then, it switches to a shot from behind and the kid suddenly has his arms at his sides, and crosses them again.
Continuity mistake: After the first time the mother disappears from the family photo, and the father and son are talking after the father "saves" the first nurse, there is a wide shot of the board with the family picture on it - and it shows the mother in the picture. When the camera zooms in on the picture, the mother is gone again.
Continuity mistake: During the party, Chi Chi starts off wearing pants, then she has a dress on, then it goes back to pants.
Continuity mistake: This film is based on the Rettendon Range Rover Murders in 1995, when some drug dealers were killed in a Range Rover, however in the film a new (1995-) Range Rover is used, I believe from footage at the time, a Range Rover Classic (1970-1995) was the car they were killed in.
Continuity mistake: In the close up of Thorne dropping his keys in a dish near the beginning of the movie, his keys are for a Dodge vehicle, but he drives a Cheverolet Sedan.
Continuity mistake: When Bruce plays the clip of the Joker appearing at the rooftop party, the audio clip that plays with it is not the same as when the Joker actually said it during the attack. The clip seems a bit more subdued than the actual voice track.
Continuity mistake: Chivo's sandwich keeps changing shape when the cop visits him.
Continuity mistake: When the car door (of Mr. and Mrs. Harmless) is being hit by the truck, the truck can be seen in the moment of collision, but disappears in the next shot, when the door flies over the street. (00:24:40)
Continuity mistake: Kiefer Sutherland plays washed up Detective Mickey Hayden chasing serial killer "Jabberwocky". In the very last scene he's walking through the park, stops at the sound of a distant gun-shot, and flips his cigarette butt away. The next shot, coming up to his parked car - he has a brand new lit cigarette and he flicks that one away too... (01:33:00)