Trivia: The entire "How am I funny?" scene was improvised by Joe Pesci and Ray Liotta.
Suggested correction: False. Joe Pesci told the anecdote to Scorsese in the earliest stages of the movie. Scorsese asked him to add it during previous script readings and further rehearsals while notes were being taken by crew members. Then it was finally shot following those rehearsals and notes. In this video all the actors involved tell how Scorsese works and even he himself says he rewrote that scene 4 times. Minute 13:04: https://youtu.be/_bbzUZuxEB8.
I have actually seen interviews where they admitted it was improvised. The reactions from the other actors was genuine.
Revealing mistake: Morrie gets whacked by Tommy with an ice pick. After that, Morrie is dead and lifeless. Soon after, Frankie Carbone (post Jimmy leaving) exits the car. When he does, the car light comes on and you can see Morrie blink. (01:45:40)
Suggested correction: Morrie does not blink, but his body moves slightly due to the car rocking.
You can see him blink in the edition I have.
I saw it yesterday on the Netflix version. Morrie blinked.
The mistake is valid. When Tommy says, "Where you going, you dizzy motherf*cker you," specifically just as he says the words "you dizzy," we do indeed see Morrie's left eye blink (the shadow covers his right eye). It has nothing to do with: "his body moves slightly due to the car rocking." This mistake is quite visible when streaming (MAX and Tubi, timecode 01:45:43), and it's especially visible on a laptop or iPad.
Other mistake: Even though this is a fictional event of how Billy Batts was murdered, he was a made man in the Gambino Crime Family. So, it doesn't make sense for him to have a party of him coming home from prison at a rival family's establishment, meaning Henry Hill's club, which was a Lucchese Crime family hangout. He would have had the celebration on his own turf, around his own family.
Suggested correction: While there is no way to prove how factual it actually is, this is almost exactly the way the real-life Henry Hill told the story in the mafia memoir, Wiseguy. The only differences being that Batts was not killed that night, but a couple of weeks later, and Henry did not own the club, Jimmy did.
Well, that isn't at all the disagreement here. My only concern was, why was a Gambino made man having a party at a rival family's establishment and not on their own turf? That's the blooper here.
Continuity mistake: When Tommy kills Stacks he shoots him once in the back of the dome, then cracks Carbone's castanets about the coffee. Then it cuts to a slo-mo reprise of the whacking with a Henry voice over and Tommy shoots 6 times.
Suggested correction: After Tommy shoots Stacks in the back of the head, you see Carbone come into the room with the coffee pot, a shocked expression on his face. While the camera is focused on Carbone you can hear Tommy continue to shoot Stacks several times off-screen.
Also, the slo-mo of Tommy shooting Stacks the blood splatter is already on the wall before he shoots him.
Other mistake: When we see the shot couple in the pink car, there's blood spatter inside the windows and windshield, so that means the windows were up when they were shot, and they were shot in the car. It makes no sense that neither the windshield nor the windows are broken. If Jimmy shot them from the front, he would've had to have shot them through the windshield. If he shot them from the side, he would've had to have shot them through the window.
Suggested correction: This one is pretty weak. Jimmy knew them. He could have easily walked up to the door and opened it, as if to admire the car, as if to talk, or for any other reason, shot them, and closed the door.
Continuity mistake: At the beginning of the movie they pull to the side of the road and stab and shoot the not yet dead man in the trunk. In this scene Jimmy shoots him 4 times. Later, when they get to this scene in the story and show it again in slow mo, Jimmy fires the gun 5 times. (01:00:34)
Suggested correction: Jimmy shoots the gun 3 times in each scene.