Continuity mistake: When Homer is walking to Snake Root, he has a rolling pin in his box. You can see the pin change positions in the box.
Continuity mistake: When Homer has just been given the gold medal at the National Science Fair, and he turns around to try to spot Werner Von Braun, several of the people in the crowd jump a lot closer to him when he turns back around.
Quentin: They watched us get arrested. We're practically ex-convicts. They'll never dance with us.
O'Dell: Jesus, Quentin, you don't know anything about women.
Principal Turner: Miss Riley, our job is to give these kids an education.
Miss Riley: Mmm-hmm.
Principal Turner: Not false hopes.
Miss Riley: False hopes? Do you want me to sit quiet, let 'em breathe in coal dust the rest of their life?
Principal Turner: Miss Riley, once in a while... a lucky one... will get out on a football scholarship. The rest of 'em work in the mines.
Miss Riley: How 'bout I believe in the unlucky ones? Hmm? I have to, Mister Turner, I'd go out of my mind.