When the aliens are defrosted, AEIOU goes through the pipe headfirst. When he arrives at the end of the tube, he comes out feet first.
As Absid first sees Dee Dee and begins to self-destruct, Stovitz is sitting next to him smoking a cigar with his left hand. In the following shot, Stovitz's hands are both on on the table and the cigar isn't seen again.
During "Justine," the nerd with the glasses and pocket protector drastically changes positions numerous times from shot to shot.
Spyder spits out the french fry without getting ketchup on his face. Cut to a different angle and there's ketchup all over his chin.
As Dee Dee and ABCD stop beside the Heidi High statue, her hair is pulled back. In the following shot they're standing in front of the statue and her hair is down.
During the finale rendition of "When the Rain Begins to Fall," Craig Sheffer lip-syncs Pia Zadora's line "We'll be together."
After making out with Absid, Diane's wannabe beau says "It was kind of interesting," but his mouth never moves.