Question: At the very end when Lisa is a gym instructor, when they pan from her feet up, on VHS and on my DVD the Rocky theme is played. But whenever I see it on cable, the Weird Science theme is played instead. Why is this?
Chosen answer: They probably only had permission to use the song at the cinema and take home releases, so when shown on broadcast TV they'd have to use another song.
Answer: According to the Wikipedia page for this movie, Lisa transforms Chet into a giant, talking turd.
Casual Person