When Principal Vernon first comes into the library, the toilet seat cover isn't hanging out of the back of his pants. When he exits, the cover suddenly appears.
When Jake is talking with Reggie Ray in front of the lockers, he pulls the lock up on his locker. In the next shot, from Reggie Ray's view, he pulls the lock up again and then opens his locker.
After the Marty flashback when Coach picks Jake up for a backbreaker, Jake is facing him. In the next shot Jake is facing away from him.
When Janey is talking to her dad, the ace of Spades in his hat changes between being straight to being on an angle in his hat between shots.
When The Wise Janitor is sitting on the bench with Jake, the zipper on his raincoat moves up and down between scenes.
Varying from scene to scene that includes the character of Malik, between theatrical and deleted footage, his hair changes inconsistently in length and style.
This is clearly intentional - he switches through just about every stereotypically "black" hairstyle. It's consistent with his status as the parody of the "token" black character.
This is clearly intentional - he switches through just about every stereotypically "black" hairstyle. It's consistent with his status as the parody of the "token" black character.
Football season is depicted as taking place after Spring Break and just a few days before the senior prom (which is attended by freshmen, no less). this schedule is clearly lain out on the marquee sign in front of JHHS in the first scene featuring the school, when Janey's dad first drops her off. Furthermore the football games are carried out with no regard for rules or logic. It's all humorous fantasy.
When Ricky gets the attention of the people in the airport, you can clearly see that his "missing tooth" is just blacked out. One of the studio lights is reflected in it.
When Janey falls through the stairs, it is obviously a stunt double who has well developed arm muscles.
When Aureola, the nudist exchange girl is in the director's office, in one shot you can see 2 extras looking towards the office (or better the naked actress), in the next scene, she has disappeared.
In the beginning of the movie, when Janey's grandparents walk into her room, she gasps, but her lips don't move.
When Jake and Ricky Lipman are both after the girl, Ricky runs across the street dodging through cars. When one of the cars stop, the car in the left hand corner of the screen seems to be a face of a Chevorlet Metro. But when that car stops and beeps its horn, its horn is off audio. Chevy Metros have a high pitched horn. Chevy Metros don't have a regular car horn audio.
The band in the background of the prom dance sequence are playing/not playing at inappropriate times in the music.
Reflection in the mirror on the wall in studio still image 3.
Janey recalls Christmas of 1989 by saying that "Daniel Day-Lewis won the Best Actor award for My Left Foot (1989)", when in fact the ceremony took place months later.