A post-credits scene (also called a stinger, tag, credit cookie, Easter egg or movie coda) is a short clip that appears after some or all of the closing credits of a movie have run. It is usually either included for humor (where it may be called a "stinger gag") or to set up a possible sequel, as well as to encourage the audience to stay through the credits during the theatrical release, possibly to help avoid a theater crush.

Before stingers, movies frequently ended with a line of text advertising that a sequel was planned. One example is the 1963 James Bond film, From Russia with Love, the first in the series to show the ubiquitous "James Bond will return in..." just before the ending credits. The Beatles' Yellow Submarine features an appearance by band members in a stinger after reversing their initial displeasure with the project. Animal House (1978) altered the "When in Hollywood, Visit Universal Studios" card by adding "Ask for Babs," a reference to a character who had become a tour guide there.

Captain America is a fictional character, a superhero who appears in comic books published by Marvel Comics. The character first appeared in Captain America Comics #1 (cover-dated March 1941), from Marvel Comics' 1940s predecessor, Timely Comics, and was created by Joe Simon and Jack Kirby. As of 2007, an estimated 210 million copies of "Captain America" comic books had been sold in 75 countries. For nearly all of the character's publication history, Captain America was the alter ego of Steve Rogers, a frail young man who was enhanced to the peak of human perfection by an experimental serum in order to aid the United States war effort. Captain America wears a costume that bears an American flag motif, and is armed with an indestructible shield that can be thrown as a weapon.

An intentionally patriotic creation who was often depicted fighting the Axis powers of World War II, Captain America was Timely Comics' most popular character during the wartime period. After the war ended, the character's popularity waned and he disappeared by the 1950s aside from an ill-fated revival in 1953. Captain America was reintroduced during the Silver Age of comics when he was revived from suspended animation by the superhero team the Avengers in The Avengers #4 (March 1964). Since then, Captain America has often led the team, as well as starring in his own series.