Mirror scene
In the "mirror scene", Pinky, dressed as Firefly, pretends to be Firefly's reflection in a missing mirror, matching his every move—including absurd ones that begin out of sight—to near perfection. In one particularly surreal moment, the two men swap positions, introducing the question of which is the reflection. Eventually, and to their misfortune, Chicolini, also disguised as Firefly, enters the frame and collides with both of them.
Although its appearance in Duck Soup is the best known instance, the concept of the mirror scene did not originate in this film. Harold Lloyd used essentially the same routine in his short The Marathon (1919). Max Linder included it in Seven Years Bad Luck (1921), where a man's servants have accidentally broken a mirror and attempt to hide the fact by imitating his actions in the mirror's frame.[14] Charlie Chaplin used a similar joke in The Floorwalker (1916),[6] though it did not involve a mirror.
This scene has been imitated many times; for instance, in the Bugs Bunny cartoon Hare Tonic,[6] the Mickey Mouse cartoon Lonesome Ghosts, The Square Peg (1959), The Pink Panther (1963), the Tom and Jerry cartoon Cat and Dupli-cat (1967), Big Business (1988), the X-Files episode "Dreamland" (1998), Garfield: A Tail of Two Kitties (2006) and the Family Guy episode "Road to Germany". Harpo himself did a reprise of this scene, dressed in his usual costume, with Lucille Ball also donning the fright wig and trench coat, in the I Love Lucy episode "Lucy and Harpo Marx".[15]