In the judge's office, Gambini claimed that he had been practicing law for about 16 years. A few moments later he stated that he defended the "first guy they caught" in the Son of Sam murders. Assuming that the film is set in 1992, that would mean that Gambini began practicing law in 1976. The Son of Sam murders occurred from July 1976 to August 1977 when David Berkowitz was arrested. Never mind the fact that a suspect would not go to trial during an on-going murder investigation, it would also mean that this trial of "the first guy" would have had to have taken place prior to Berkowitz being arrested and charged. This would mean that Gambini's very first case would have been to defend a high profile serial killer which would have been very unlikely. This could be an attempt at ironic humor by the film makers however, as Gambini's first real case is to defend murder suspects, which once again would be very unlikely.
The prosecution states that "verdict" is a term passed down from Old English meaning "truth". This word comes from Middle English and is defined as "an opinion or judgment;" an opinion, by definition, does not represent truth, but the subjective conclusion that one comes to.
When Vincent and Lisa are arguing at the cabin, Vincent says he has "a dress code problem." But at that point he has a new suit, he has worn it in court, and it hasn't yet been tossed in the mud, so his attire is not an issue.
When Vinny and Lisa eat lunch at the picnic bench after Lisa bails Vinny out of jail for the first time, they are shown unwrapping the cutlery. Then, when the shot changes, they are shown unwrapping it again.
After requesting a continuance to look over Wilbur's testimony, Judge Haller says the clerk will call back after 3, giving Vinny a "stay of execution...unless he can win the case in the next 90 minutes" (implying that it is currently 1:30). Then immediately after the recess, the time on the digital clock outside the window of Dave's Barbeque reads 12:55. It later reads 4:25 after only a couple of minutes of conversation with Ms. Vito.
When the courtroom is waiting for Vinny to appear, the jury box is completely empty. Vinny then arrives and explains his awful tux and why he was late. In the following shot, when the judge calls for the prosecutions opening statement, the entire jury is present and seated. The transition between shots may be assumed to represent the passage of time, but the scene seems continuous, and it seems that the jury "magically" appears.
When Stan and Billy are entering their cell for the first time they are carrying their bedding. In one shot Billy's sheets are folded one way and in the next shot the position of the white sheets changes.
When Vinny is in Judge's office telling him about his name being Jerry Gallo and he messes up the chess pieces, before that, between shots the pieces are arranged in different order. In the same scene the cane leaning against the wall/fireplace changes positions.
During the arraignment Judge Haller beckons Vinny to the bench with his left index finger. When the camera changes from in front of to behind the judge he is then instantaneously beckoning with the left index and middle fingers.
As Vinny is cross-examining Ernie Crane with the pictures of his view from his house to the SAC-O-SUDS, Vinny begins to lay the photos on the witness stand ledge. In subsequent shots, the photos are alternately on and off the ledge.
When Vinny leaves to bring Ms. Vito back into the courtroom to testify he tells her he needs her to come back inside and he needs to use the phone. He repeats he needs the phone. He doesn't appear to ever have had any intention to use the phone, as he had just a 3 minute recess.
When the public defender is presenting his opening statement to the jury, you can see Stan in the background looking away from him in embarrassment, however, the next shot is a quick cut to Stan and he is looking at him.
In the scene where Vinny is holding the tape measurer at the back of the court it is first not taut, then in the scene when he is holding up his fingers for the second time it is very taut, when they cut away to Mrs. Myers and then back to Vinny it is not taut again.
In the opening scenes, the trees in the park across from the courthouse are completely bare, not even a sign of buddings. Even if the trial takes 2 weeks, at the end of the film the trees are completely full of grown green leaves, unlikely for a short period of time.
When Vinny is bailed out of jail there is a group of protesters outside protesting an upcoming execution. The only prison in Alabama that holds Death Row is Holman Prison in Atmore, Al. Atmore is on the West side of Alabama near Mobile ... nowhere near the Georgia line.
This film was made in Jasper and Putnam Counties in Georgia, nowhere near the Alabama line. On the highway scenes the highway signs have been changed to Alabama signs but for in town scenes, which is actually Monticello, Georgia the signs are still the actual Georgia highway signs.
While judges do make errors once in awhile, it is practically impossible that any judge would overrule Vinny's objection to George Wilbur's testimony. To do so would almost certainly cause a conviction to be overturned at the appellate level.
Near the end of the movie, Judge Haller walks out of his office, and the sign on the door says "Probate Court". A Probate Judge would never conduct a criminal trial; murder trials in Alabama (and most states) are always conducted by Circuit Judges.
When Bill and Stan get arrested, they're under the impression that they're in jail for shoplifting until Bill figures it out during the confession. Due to the Writ of Habeas Corpus, it's nearly impossible for someone in custody to go that long without being told what he has been arrested for.
Vinny is a lawyer licensed to practice law in the state of New York and not Alabama. While his lies about his career would give the judge reason to allow him to practice pro hac vice, his defense team would need to include someone who is licensed to practice in Alabama to make a motion in court to allow him to practice for the trial.
In the exterior courthouse scenes, the US and Alabama flags are seen flying from the balcony. In the first scene, the flags are correct, in that the US flag is on the right and the state flag on the left. In the closing scene, as Vinny leaves the courthouse, the flags are reversed, which is not in keeping with flag flying protocol.
The black lady on the jury (seen when Trotter talks of "our ancestors from England") also serves Vinny in the café during the lunch recess before his presentation of evidence. If she's on the jury, she would not have been allowed to leave the court to work, and least of all to serve the defense attorney.
In the scene where Vinny is telling Billy why he should keep him as his lawyer, he pulls out the deck of cards. At first the card is the ace of spades. He flips it over in his hand and then it is a joker. However, this is a card trick to back up Vinny's words that "Nobody pulls the wool over the eyes of a Gambini."
It has been incorrectly noted that when Vinny asked the question, "does the defense's case hold water," he was referring to the prosecutors case instead. This is incorrect. When Vinny is asking that question, he is referring to his own defense's original argument, and whether that specific case holds water. After Vinnie has his epiphany regarding the picture of the tire tracks and how the types of the cars figured into the case, he changes the defense argument from the defendants driving an identical car as the actual perpetrators, to one of the defendants driving a completely different make and model of car, thus proving that his clients could not have carried out this crime. He presented this new theory when he did and in this manner not only to more dramatically emphasize this difference, but also to take advantage of the fact that he had his star witness and car expert, Miss Vito, on the stand to explain how these newly realized facts served to exonerate his clients and to prove how his original argument was indeed flawed.
When Vinnie has his final confrontation with J.T. in front of the store, He takes a flying leap through the air as he swings with his fist. As they both come to a landing, we can see them "bounce", indicating that they hit the stunt mattress.
When Vinny hears the owl screech while he and Lisa are in Trotter's cabin, he grabs a pistol from a gun case, opens the cylinder and snaps it shut with a flick of his wrist, however, it is clear that there are no bullets in the cylinder.
When George Wilbur is testifying, he claims to have performed chemical analyses on the rubber from the tires and tire marks with a Hewlett Packard gas chromatograph with a "flame analyzation detector". The correct technical term is a "flame ionization detector".
During the climax when Lisa is describing the difference between the two automobiles, she mentions that positraction is a limited slip differential. She explains that a limited slip differential sends equal power to both wheels. This is the description of a closed differential. A limited slip differential ensures that not all power goes to one wheel, but does not create a 50/50 split in power.
During the last scene when Vinny and Mona Lisa are driving away from the courthouse, the position of the sun (key light) switches from left side to right side with each shot change. Apparently, the scene was shot on the same road, but in opposite directions.
Throughout the trial, the tire size on the defendants' car is stated as "75R14." George Wilbur also testifies that he was able to determine this from analysis of the skid marks. However, 75R14 only describes the height of the sidewall in relation to the tread width (called "aspect ratio") and the rim size. It is tread width that determines the characteristic of a skid mark, which is never given. Further, it is impossible to determine aspect ratio or rim size from simply analyzing a skid mark.
Vincent "corrects" the judge to say that his name is Jerry Callo. But Lisa is not there. The next scene is the diner and there's no conversation about the name change. Lisa storms out and they don't talk to each other until back in the courthouse. There is never an opportunity for Vincent to tell her that he changed his name to Callo, yet Lisa was able to call the judge in New York to get the judge's clerk to fax a letter documenting the stellar record of Jerry Callo.
When Vinny is looking at the pictures of the tire tracks supposedly made by spinning tires you can clearly see the tread pattern. If the tires had been spinning the tracks would have been smeared. The tracks shown with clear tread pattern would only have been made if the car had driven through water or paint.
The photo of the skid marks is an obvious fake - it is virtually impossible to lay a perfectly straight skid mark caused by acceleration (not braking) and there would be discontinuity as the tire bounced up and over the curb. They actually painted skid mark on the vertical surface of the curb, all the way into the corner.