One thing that always intrigued me in zombie stories (books, TV, movies, games, etc.) is the fact that nobody seems to have ever heard of the term "zombie apocalypse" before it happened in their world.
It always seemed unreal to me that in a modern day Earth (like The Walking Dead, for example) none of the characters have ever watched a movie or even heard of this "genre", because when the apocalypse happens they never know what they are facing.
Is there any story where the characters actually watched a zombie movie/TV show, read a zombie book or played a zombie game before the apocalypse happened in their world? And why is it so rare?
One example is enough. I'm not requesting a list. It's just that this is something that always intriged me because I've never seen a story where people knew about zombies before the outbreak.