Continuity mistake: In the scene where Eric Stoltz's character, Keith, fresh out of the shower, is confronted by his father about the college money, he has two distinct hairstyles. These two hairstyles show up again at Hardy's house party.
Continuity mistake: When Hardy is giving Keith a hard time at the gas station by dropping the money on the ground, Keith picks it up, then all of a sudden the shot zooms in and Keith is holding the engine dip stick.
Trivia: John Hughes wrote the role of Amanda Jones for specifically Molly Ringwald to play. When she refused, Lea Thompson picked up the role but Hughes has now refused to work with Ringwald because she turned the film down.