While Stevie Wonder is performing his song, he can also be seen standing next to Big Drag by the stage.
When Honeywagon photographs Big Drag and Clyde in the beach hangout, many of the cast members are seen both standing and sitting between scenes.
When the kids first congregate around The Potato Bug, there is a gap within the group when shot from behind to be able to frame The Potato Bug. When shot from the front, there is no such gap in the group.
The windshield and rear-view mirror were removed from the cop car that was involved in the go-kart chase of Von Zipper.
When the surfers push the drag car over Big Drag's foot, you can see the wooden block the car ran over to lift the car.
Shadow of boom mic can be seen on Potato Bug's tent as Dee Dee is talking with him.