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.
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.
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.
After the camera pans down the Lake Eerie sign, there's a long shot of the beach in which the man in the red and white shorts is seen far inland, slowly making his way across the sand with a surfboard tucked under his arm. In the very next shot he's standing next to the water throwing the surfboard onto the lake.
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.