I wouldn't be surprised if there was some sort of equivalent in any creative endeavour. |
|
I can certainly think of a few from the world of pop music (in the sense of introductions to a song or tune):
Hard Day's Night (the opening chord);
Summer Holiday (the lead guitar intro);
Eagle (again, an opening chord);
Dancing Queen (opening chord and vocal harmonies).
Since theatre and film are closely related to literature (in the sense of often interpreting books), they will naturally follow the same principle.
The only art-forms where it wouldn't apply, I guess, are things like sculpture and paintings, where the whole thing is seen in one go. There isn't really the equivalent, there, of an opening glimpse of what's to come.
There is a similar consideration that often goes into the ending (of a book, song, etc.) The last line of a story doesn't have quite the same function as the opening one, but it can impart a lasting memory or impression. That, too, can be important, albeit for a different reason.
Alex