A great example of this is the Film From Dusk 'til Dawn. Half way through it changes from a run of the mill crime caper thing into SEXY MEXICAN VAMPIRES! They are the sexiest vampires there are. Though once they changed into vampires they weren't so sexy.
|WITH A SNAKE!|
But I digress.
So if you're writing about a caveman searching for the secret of fire have him kidnapped by aliens and fight in a sophisticated galactic war!
Love story into camel racing!
Pirates into pirates! YOU CAN'T GO WRONG WITH PIRATES!
Dystopian emo-fest into PIRATES!
Gothic horror in a Victorian school into PIRATES!
Dancing cats into PIRATES!
It will revitalise your story no end.
|PIRATES! (no snake)|
Merry Chrimble everyone!