Continuity: After we see the twins push Crater-Face into the pool, we see them a couple of scenes later after Michael reveals himself as the mystery rider and we notice that the twins are completely dry.

Continuity: When the twins are singing about Brad for the talent show, and Michael was playing the piano (you have to listen and watch), his hands are suppose to go across the keys but he is still doing the fake up-and-down-hand-move.

Visible crew/equipment: During the first encounter of the "Cool Rider" the police show up and he jumps over the car. In the rear shot, you can see the ramp on the ground under the police car that the stunt man used to jump the car.

Revealing: During the luau when the motorcycles are attempting to jump over the pool, the cables that are stopping the cycles, allowing the riders to go flying into the pool, are visible.

Continuity: When Michael is doing his bike up and is spraying his helmet, his hands are full of oil, but in between his fingers are clean. This shows that is is obvious someone has smeared the oil on, otherwise in between his fingers would be just as dirty. And his hands wouldn't be perfectly black, they would be streaked.

Factual error: In the scene where the substitute teacher is teaching the children about reproduction, the Playboy magazine is from September 1962, but the year is supposed to be 1961.

Other: Eugene is suspended above the stage with the box of paper leaves and snowflakes ready to throw them down at the correct moments; but when the Fall section of Girl For All Seasons is on he doesn't throw any leaves. Also, the amount of snow coming down over the stage at the Winter section is completely disproportionate to how widely and evenly Eugene could distribute it.

Plot hole: After the big chase outside the bowling alley how does Michael get close enough to light Stephine's cigarette without her seeing him he's riding a Motorcycle?

Audio problem: When singing Reproduction, a boy sings "Oh I think I'm gonna throw up"; yet he sticks his finger down his throat and keeps it there until the line is over, never closing his mouth; how did he make the 'p' sound on 'up' without closing his lips together? The words are pronounced very clearly and the camera doesn't cut from his face until after the line is done.