Trivia: The book that Bugs is reading at the start of the cartoon is authored by "Burton" - a reference the Warner Brothers production manager, John Burton.
Trivia: When we see Bugs telling the other cowboys about the acts for the vaudeville show, you can see behind him there is a poster for an act entitled "Frizby the Magician." This is a reference to the Warner Brothers director Friz Freleng.
Trivia: The first Tom and Jerry cartoon in which the characters are named.
Trivia: In the cartoon's opening title credits, there is no "Layout" next to Robert Gribbroek's name, which makes him appear to be an animator.
Trivia: When Elmer finds himself in the year 2000, he picks up a newspaper with a headline saying "Smellevision replaces Television!" Underneath this there is a caption saying "Carl Stalling sez, "It will never work!" Carl Stalling was the music composer and arranger for the Looney Tunes and Merrie Melodies shorts produced by Warner Brothers.
Trivia: In the cartoon's opening title card, there is a tin of cat food with "Farren's Finest" on the label. This is a reference to the assistant animator, Jack Farren.
Trivia: When Cecil Turtle shows Bugs Bunny a blueprint of his turtle shell, look at the bottom right and you can see the name "Michael Sasanoff." Sasanoff was Robert Clampett's layout artist.
Trivia: Look at the flag on the tail of the bizarre animal which the animator re-draws Daffy as - it reads "screwball."
Trivia: The first Tom and Jerry cartoon to win an Academy Award for Best Animated Short Film.
Trivia: The final Bugs Bunny cartoon produced at Warner Brothers.
Trivia: The opening credits on this cartoon are the artists' actual signatures.
Trivia: When Hans arrives in America, he gives his cousin Willie some cheese. Hans then looks around and sees some traffic coming past. The traffic includes a pink lorry saying "Foster's Eggs" and a yellow lorry saying "Fritz Transfer Co." - a reference to the writer Warren Foster and director Friz Freleng, respectively.
Trivia: Various members of the Warner Brothers animation staff appear in the short. Michael Maltese plays a studio cop, Gerry Chiniquy plays a director and Henry Binder appears as a stagehand who throws Porky off a soundstage after his sneezing interrupts the shooting of a ballet film. But Mel Blanc dubbed all their voices, as the footage was shot silent.
Trivia: At the end of the cartoon, traditional Bavarian music is played over the "That's All Folks!" title card instead of the normal closing theme.