A Post Credit Sequence can be a throwaway scene, out-takes or, as fans of the Marvel Cinematic Universe will quickly tell you, they can be an important epilogue that happens during or after the end credits have finished rolling. Sometimes both.
It’s used as a bonus for audience members who stick around to read all the professionals who helped create the movie they just watched.
And, it’s also a great way to generate word of mouth about the bonus scene that creates important ‘buzz.’
Great examples are The Muppet Movie (1979) Airplane (1980), Ferris Bueller's Day Off (1986), many of the PIXAR movies, Napoleon Dynamite (2004), and Captain Marvel (2019).
Feel free to let us know which Post Credit Sequence was your all-time favorite!