Continuity mistake: When John C. Reilly is in the dressing room telling the airplane story, the time changes back and forth on the clock behind him.
Continuity mistake: The young son of the Chinese owner of the violin is near-sighted and his glasses have concave lenses. When he attends the auction as an adult he is far-sighted with incredibly thick convex lenses.
Continuity mistake: When he puts the pins in her eyes, evey time it is shown it's different - sometimes they are all covered in blood, sometimes only some of them or one, and sometimes there's no blood at all.
Continuity mistake: When the van stops and Fish's body is sent flying away, the position of his body on the ground differs between shots.
Continuity mistake: Ben Bart passed away earlier in the film but can be seen dancing on stage with the character Gertrude, at a James Brown concert where he is performing "I Got Soul (Super Bad) ". (01:46:00)
Suggested correction: During that sequence, they intercut James in his gold jumpsuit, with long hanging-down hair, and James in a black-and-white checked vest, doing the same song. In the black-and-white vest era, Ben Bart is still alive, so the dancing could have been from that era.
While that does seem to be the case, it should be pointed out that Ben Bart died in 1968, but the song James Brown is singing, "Super Bad", was recorded in 1970.
Visible crew/equipment: When Gene is on top of the coaster at the amusement park, you can see a cameraman below filming.
Factual error: When Llewyn is driving back to NYC from Chicago, he passes a couple signs stating that Akron, OH, is at the next exit off the highway, on US Route 80. US 80 passes exclusively through the South, from Dallas to the Atlantic Ocean in Georgia, and doesn't even come remotely close to Ohio. (01:13:58)
Suggested correction: It's Interstate 80, which does pass through Ohio, not Route 80.
The mistake is correct. It's the US Route 80 sign which has black letters on the white shield. An I-80 sign would have white letters on a red and blue shield.
Continuity mistake: When Ren is dancing at the drive in, he starts dancing with a girl then stops to watch her. When he starts dancing again he moves slightly in front of her in the shot. Then in the next shot they are side by side.
Continuity mistake: Godfather Drosselmeier switches on the mechanisms in the toy castle to make the figures inside and around it begin moving as music begins playing from it as well. The soldier on the tower begins spinning around the tower. But after the kids look at it for a moment and then Fritz begin a asking in Drosselmeier to make the soldiers in it do different things, the figures have stopped moving, and in some shots disappear. Yet the music is still playing from the castle and the sounds of the mechanical components moving can still be heard.
Continuity mistake: Just as the moderator finishes asking Lydia "Do you have a slight self-consciousness about the incredibly varied things that you've accomplished", he places his right hand on the armrest, but when the shot cuts, his right hand is over his lap. (00:09:25)
Factual error: Brian Wilson's panic attack on the airplane takes place circa 1964. However, the interior of the plane had distinctive sculpted doors on the overhead bins, a style first introduced in 1983 on the Boeing 757.
Continuity mistake: During the opening credits the protagonist is talking with his parents. Throughout this, the whiskey in the bottle changes level depending on the shot. (00:01:20)
Character mistake: After the math club students, in unison, cited pi to 3.141592, Percy continued with "65839" - but only the "65" are correct. He should have said "65358..." before being cut off (or "65359" if he was rounding up the last "89793238"). Even though the movie is classified as a comedy, Percy was showing off, but he was wrong. Charlie, Math Club Advisor, also committed a mistake because he stopped Percy by saying "Percy, we got it. Good" (as though Percy was correct). (00:04:29)
Continuity mistake: When Will and SA5M are in CBGB's and SA5M uses her phone to take a picture of them, Sa5m's head and eyes have already turned toward the camera when the picture is taken. However, when the actual picture is shown, SA5M is looking directly at Will.
Continuity mistake: When Tom traps Jerry in the blinds, he pulls the cord and squashes Jerry. At this point, you can see Tom is holding the cord, but when we Jerry sliding down the blinds in the next shot, Tom is no longer holding the cord.
Factual error: The shop owner shows him a tape of the Joshua Tree by U2 and says it is the best concert he has seen, but the Joshua Tree wasn't released until 1987.
Continuity mistake: The giant maker compound was purple when Franqcuer was created, but it turned orange when Lucille made another giant flea.
Continuity mistake: When Shaggy and Scooby are approaching the Demon as he eats, it is shown that he is eating from a platter of hamburgers and french fries. Scooby and Shaggy bump into his table, knocking the food all on the floor. When Shaggy and Scooby quickly put all of the food back on the table, it now has french fries and hot dogs.
Continuity mistake: When Priscilla meets Elvis in Germany the position of the letters on the bed and of the papers scattered on the floor change positions between shots.