Duffless/References

Trivia

 * During the tour of the Duff Brewery, the three vats are marked "Duff", "Duff Light" and "Duff Dry". The vats are filled by the same pipe, indicating different names for exactly the same product. This may be reference to a urban legend that some gas stations hooked up their regular, plus, and super unleaded to the same tank, charging more money for customers who bought plus or super while getting the same product.
 * Martin had a flying balloon which was deflated when Nelson shot it from his B.B. Gun exhibit. Nelson states that he was aiming for Martin's head. In the syndicated version, both Martin and Nelson's exhibits at the Science Fair were removed. In the DVD release, this scene was left in uncut.
 * Also cut in syndication is the scene of Chief Wiggum accidentally showing a home video of him eating a hot dog in a kiddie pool (and later spraying his wife with a hose) during the anti-drunk driving class.
 * This is the first appearance of Sarah Wiggum (Chief Wiggum's wife).
 * It is revealed Hans Moleman is 31 years old and looks old because of severe alcoholism (though later episodes would have Hans Moleman as 80 years old).
 * When Barney was talking to the quality control worker, one of the bottles that passes by is actually a jar with Adolf Hitler's head in it.
 * Lisa's steroid-pumped tomato being used as a solution to stopping world hunger is actually possible. Since steroids cause infertility and sterility in both sexes, couples won't be able to have children and therefore, won't have to spend money or time trying to find food for their offspring.

Cultural references

 * The final scene in which Homer and Marge ride off into the sunset singing B.J. Thomas' "Raindrops Keep Falling On My Head", parodies the ending to Butch Cassidy and the Sundance Kid.

Goofs

 * In the scene where Homer returns to Moe's Tavern, you are able to see two Larry's at once; sitting drinking beer amongst other patrons.
 * It's quite impossible for Homer to be listening to Queen when he was 17. Since Homer is 38, and the episode was released in 1993, that means that he claims he was listening to Queen in 1972, while their first album was released in the Q3 of 1973. What's more he has a poster hanged on the wall, of the album "A night at the opera" which was released on November 21, 1975, when Homer was 20.