When the episode begins, right after Abe takes the place of the MGM lion and roars, there is a frame showing the Clone High mascot, DNA Dan, standing next to a phonograph and saying "Let's go to the dark side!"
After the first commercial break, there is a frame flash of a rasin smoking a person.
When Scudworth is about to speak at the PTA meeting, there is a frame flash of him that reads "Scudworth is your favorite character"
When Abe and Cleo are sitting on the roof debating if they should go to first and a half base, there is a frame flash of them both naked (Cleo is tastefully wearing pasties).
When JFK is singing in a wheelchair, there is a frame flash of him surrounded by nurses and women in underwear that says
. This is a reference to a later episode.
Joan appears in a frame flash, as what appears to be the Mother Mary praying, during her song about Abe.
When JFK falls through the ceiling and breaks the table at the PTA meeting, it sounds like he just says gibberish. If you play the audio backwards, he is actually saying, "I am talking backwards and telling you to watch Clone High... And for us to get an emmy... I'm saying it backwards because it's sneaky!"
At the end of the episode there is a frame flash of the crazy dragon with a can of vegimite in one hand and Ghandi sitting on its back saying "For more information about rasins, consult your local library".