Chekhov's "Chekhov's Gun" Gun: Anton Chekhov's The Sea-Gull

Anton Chekhov had a very firm opinion about loaded guns in stories: "One must not put a loaded rifle on the stage if no one is thinking of firing it."  The non-firing of a Chekhov's gun can leave the reader with an unsettled feeling at the end of a piece of literature.*  When I saw a loaded gun appear in Act II of Chekhov's The Sea-Gull, I became excited since I knew it would be fired by the end of the play.