on the design. It's pretty self-explanatory. And I will grant that it's eerie given that it's on the only episode of any series ever that had an entire act of World Trade Center jokes." Cultural references The song used during Duffman's first and subsequent appearances is "Oh Yeah" by Yello, popularized in the film Ferris Bueller's Day Off. The Original Famous Ray's Pizza shop Homer sees is a parody of independently owned pizza stores that carry the name "Ray" in their name. The musical sequence played during the Flushing Meadows segment is a stylistic parody of the piece "Flower Duet" from the opera Lakmé by Léo Delibes. When the traveling bus passes some Hasidic Jews, Bart mistakes them for ZZ Top, and when he visits Mad magazine's offices, he sees Alfred E. Neuman, the Spy vs. Spy characters, and cartoonist Dave Berg. The actor in the musical number "You're Checkin' In" was based on Robert Downey Jr., who was battling a cocaine addiction during the time of the episode creation, just as the character in the musical was. The sequence where Homer races alongside the carriage in Central Park was a reference to a similar scene in the film Ben-Hur. The final scene when the family is crossing the George Washington Bridge uses a version of the song "Theme from New York, New York", which continues to play throughout the credits. Several cultural references are made during Homer's flashback to his previous visit to New York City. During the entire flashback, "The Entertainer", a piece made famous by the film The Sting, is played. Writer Ian Maxtone-Graham had brought the piece to the attention of director Jim Reardon and asked him to try to fit the piece into the flashback. Maxtone-Graham later commented, "It turned out that the music and the visual gags fit each other perfectly." In the beginning of the scene, Homer passes by three pornographic film theaters, which are playing The Godfather's Parts, II, Jeremiah's Johnson, and Five Sleazy Pieces, plays on the names of The Godfather Part II, Jeremiah Johnson, and Five Easy Pieces, respectively. A character resembling Woody Allen can be seen during the flashback, pouring trash out of his window onto Homer. When Homer falls into the sewer, he falls down to the underground world of mutants portrayed in the movie C.H.U.D. Reception In its original broadcast, "The City of New York vs. Homer