Continuity mistake: Before the pen-stabbed-in the neck scene Joe Pesci is talking with a guy about placing some bets. A coffee cup and saucer suddenly appear on the table after Pesci leaves the place.
Continuity mistake: When news on Robert De Niro not having a casino license first hits the airwaves, the news broadcast displays a still picture of Joe Pesci having a conversation with his friend Frankie. The picture that they use is when Pesci and Frankie have tooth picks in their mouths because they don't want FBI agents lip reading what they are saying. But that didn't happen until later on in the movie. So how could they have displayed a picture of a conversation that hadn't taken place yet?
Suggested correction: Pesci can be seen holding and/or chewing on a toothpick multiple times throughout the movie, so it is more than likely that the picture was taken at a different time by a reporter while Nicky was seen in public.
Continuity mistake: When De Niro is proposing to Sharon Stone, the position of his head is not continuous between the front and back shots.
Continuity mistake: When Ace is having a meeting with Green about him firing the cowboy, Ace stubs out his cigarette. In the next shot from behind Ace is still smoking, but when in the front he has no cigarette.
Continuity mistake: It is daylight when the car of Ace Rothstein explodes. However, it is night when he is being placed in the ambulance.
Continuity mistake: When Nicky goes to Sam's house to meet with Charlie, it's very light outside when he arrives. However when he leaves about four minutes later, the sun is setting. His entire stay at the house takes place during that scene.
Continuity mistake: Stone is caught on the phone planning to kill DeNiro, who grabs her violently and pulls her black satin robe off. A frame later she has it back on.
Continuity mistake: The man who is receiving a giant check for the Tangiers raises his right hand towards his waist, but in the immediate next angle, the hand is down and he is raising it again.
Continuity mistake: After the very tense encounter between Ace and Nicky in the middle of the desert with De Niro watching Pesci leaving quickly, the distance between Ace and his car changes enormously in two different shots.
Continuity mistake: When Nicky Santoro meets the men in the desert, first he is getting out of the car with one person, but then he is in the next shot getting out of the second car which just pulled up, and he is getting out of the car with Frank Marino.
Continuity mistake: When Sam tells Nicky he's been banned in Las Vegas Sam holds a cigarette. His hand's position has no continuity between any shot.
Continuity mistake: The guy's whose head is put in a vice has a trail of blood running along the left side of his mouth which appears/disappears randomly between shots.
Continuity mistake: When De Niro is by the pool, the way he holds his cigarette changes from vertical to horizontal depending on the angle.
Continuity mistake: In the scene where Joe Pesci tells Robert De Niro that he's moving to Vegas, both of their windows are cracked. De Niro's stays opened the same length until just before the scene ends, when it is opened nearly twice as much as before.
