Factual error: As the girls are being hazed, the girl giving the orders is shown from the front and in the distance behind her are a red and white mid-1980s Chevy S10 Blazer, a white '90s VW Jetta, tho the events of the film occur in 1976. There's also a Pier One billboard in the background. Pier One wasn't incorporated until 1986. (00:20:30)johnrosa
Factual error: During a classroom scene on the last day of school one of the students has a KISS "Rock and Roll Over" shirt on. That KISS album did not come out until Nov. 76, the movie takes place in the spring of 76.
Continuity mistake: While they're driving around town talking about college, you see the three guys in the back seat, the camera goes to another angle, then a few seconds later, you see them in the back seat again, but the guys have switched places.
Visible crew/equipment: In the scene where O'Bannion gets the paint dumped on him by the freshmen, you can see a boom in the bottom of the shot between the kids legs.
Continuity mistake: In the scene at the end of the movie when they are driving to buy the tickets Slate is smoking a joint and blowing smoke rings in the back seat. However, in the next shot the window is down and Pink's girlfriend's hair is blowing everywhere and he is still smoking. How could he blow perfect smoke rings with all the wind?
Continuity mistake: Throughout the movie, Pink's car held the Kiss-face-painted statues (during the intro when it was still covered/when everyone saw it over at the Emporium/when they were on the highway on their way to the beer bust), except for the scene when he dropped off Mitch after his baseball game which was prior to the scene at the Emporium. Only Benny had the other pick-up among them (and I wouldn't include Darla's) and his was occupied the whole time.
Factual error: When Cynthia, Mike and Tony are driving to the Top Notch, there is a very clear shot of a billboard alongside the road. It advertises PCA, an HMO for employees of the State of Texas which only existed from the mid-1980's until 1992. (The film, of course, is set in 1976.)
Revealing mistake: When O'Bannion got paint dumped on him, he went to the curb to break his paddle. There is already visible white paint on the curb in the shape of the paddle prior to him slamming his paddle into the curb.
Continuity mistake: Benny's pickup truck has capless slotted mag wheels, all four the same size. In two shots when the freshmen chase the seniors, Benny's pickup cuts across a lawn and panic stops in front of Carl's house, the truck has center caps on the wheels and the rear wheels appear to be a bit wider.