Continuity mistake: When LoveBurger leaves the stage, a raucous teen jumps onstage and blares Paradise City from his boombox. William recognises the song and jumps over to the stage. When he jumps on, he knocks the other guy over. Watch as the other guy falls off the stage, as a microphone on top of the stage falls over and smacks the camera at the top of the screen.
Continuity mistake: In the beginning when Preston is talking to Denise about when he first met Amanda, he says she was eating a Pop-Tart. You can see when she is leaving, the pop-tart is near the centre of the desk, but it shows it falling off when no one ever touched it.
Continuity mistake: When Preston and Denise are in the car driving to the party Preston appears to be only wearing a shirt yet when you see him later he is obviously wearing a t-shirt underneath.
Continuity mistake: When Mike goes with the two girls who said he was the hottest guy in school and they say he said they were skanky, they were sitting on a bench, and at the next scene he appears sitting on a swing. [It is both a swing and a bench. If you watch Mike sit down, you can clearly see that it is a swinging bench-type chair.]
Continuity mistake: After Mike apologizes to William for humiliating him at graduation, William forgives him and they toast their wine. In the wide shot, Mike puts his wine bottle down on the piano. In the close-up, he is still holding it.