Continuity mistake: When Remo Gaggi is talking to Andy Stone about Ace cussing out the Board, there's a pack of cigarettes beside Gaggi in his car. The camera angle changes to show Stone's face, who is outside the car, and when it flips back to Gaggi, there is a Zippo lighter in place of the cigarettes. The camera goes back to Stone, and when it comes back again, the Zippo is gone and the cigarettes are back. And to top it all off, not once did Remo smoke in this scene.
Continuity mistake: When Joe Pesci is beaten and then buried - look at the blood on his chest. In one shot it is all over - the next it is just a smaller patch.
Continuity mistake: When Joe Pesci is stabbing the guy with a pen that insulted Ace, the pen is shown without blood after there was significant blood on it the cut before, then it goes back to having blood on it.
Continuity mistake: When Ace fires Don Ward, the shot is on Ace and you can see Don turn away. When the shot changes to Don, you see him turn away again.
Continuity mistake: When Robert De Niro is at the restaurant with Sharon Stone and catches her with James Woods, the menu under his hands goes from being horizontal to vertical.
Continuity mistake: When Artie Viscano is complaining to his brother in law about Las Vegas, he backs into about 10 bottles. They all fall except for two, and then the scene cuts to to his brother in law and when the scene cuts back to Viscano, all the bottles are back up.
Continuity mistake: When Joe Pesci and his brother are beaten and then buried, you see one bat and then suddenly, appearing from nowhere, three bats. Sometimes they are blood covered, then clean, then blood covered again. (02:47:30 - 02:48:25)
Continuity mistake: After meeting with Ginger about Lester being beaten up, Nicky is about to leave. Before he does, Ginger hugs him and puts her arms around his neck. In the next shot her right arm has suddenly moved and her elbow is now bent. (01:19:50)
Continuity mistake: In the scene where Sharon Stone is talking to Joe Pesci about how De Niro had his guys beat up James Woods, there are 4 security monitors on the desk behind Sharon Stone. First, the top left monitor goes out. Next only the bottom right monitor is on. Then all four monitors are off. Finally, all four monitors are on again. (01:18:05 - 01:19:20)
Continuity mistake: When DeNiro catches the cheats at the card tables, he takes the one with the beard to smash his hand with a hammer. In the first shot the guard is holding the cheat down by the wrist, but in the next shot the guard's hand is up by the guy's elbow.
Continuity mistake: When Joe Pesci and his brother are beaten at the end, Dominick is thrown in the pit and facing one direction, after Joe Pesci is beaten and thrown on top, Dominick is facing the opposite direction than he was originally. (02:48:30)
Continuity mistake: In the scene towards the end before De Niro's car explodes, in the first shot when he opens the door its window is down as he gets in the car, but in the next shot as his motions are replayed, when he opens the door that window is all the way up, then it's down again in following shots. (02:46:00)
Continuity mistake: When De Niro catches Stone and Woods in the restaurant, De Niro takes out some money from his coat pocket and lays it on the table. In one shot the money is straight, in another it is diagonal and in the final shot before De Niro picks it up it is straight again.
Continuity mistake: When Ginger is arguing with the gambler at the craps table about "giving her a bigger cut", the man reaches for her purse to show her the chips she's been stealing from him. As she pulls the purse back, the gold chain strap breaks. The next shot of Ginger shows a repaired chain.
Continuity mistake: Jennifer has the diamonds inside her hair bun and she's shaking it to retrieve the diamonds onto the table. As Santoro slaps her face as a gesture to thank her and for her not to get smart with him, her hair bun comes loose and falls out into a pony tail. The next shot then shows Jennifer with the hair bun perfectly groomed again on top of her head.
Continuity mistake: When Nicky has the guy's head in a vise, after it squirts Nicky's hair changes between shots, from neat to messed up.
Continuity mistake: Towards the end of the movie, when they first kill Nicky's brother, Dominick, and they throw him in the pit, his full chest is covered in blood, but in the aerial shot it is clean with just the bloody face.
Continuity mistake: Before Pesci stabs the pen, DeNiro asks a guy if it's his pen. A glass on the right, inches away from the napkin where the pen was laying, appears and disappears between shots.
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?
Chosen answer: In the end.