Visible crew/equipment: During the grab and go stop Pickford, Don, Pink and Mitch are in the GTO. Pickford is the first to climb out of the car, If you look closely you can see the crew in the reflection of the door. This happens not once but twice when Don and Mitch return with the beer.
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.
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.
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.