Almost-Jaws
Most of the best-selling book by Peter Benchley, Jaws (1973), was made into a movie by Steven Spielberg. Then a "trailer" was made that included many of the good parts. Then others made their versions of the movie (that were only almost as good, of course - below is but one example). Your memory of the book or movie is probably now only a partial memory, and not a scene by scene, word for word replica.
Almost-Jaws
