You go to bed tonight and a wizard comes to you in your dreams and tells you from this night on, you will be transported to 1 world from any piece of media you know, every single time you go to sleep.
That world will be just as real as this one, as in if you die there, you die IRL, you will still need to eat and use the bathroom. Time passes by a .5x speed in both places while you’re sleeping so for every 8 hours you sleep you will spend 16 hours in the other world. When you go to bed in either world you are transported to the other one.
You had a good run, almost a year swapping to the world of the walking dead as you closed your eyes at night. But now you realise your luck is up. You fire off your last 5 rounds watching 5 shambling corpses hit the floor.
Putting the revolver to your head and pulling the trigger to end it, you hear an unfamiliar dull thunk instead of a click.
A split second later the rest of the dead reach you. They bite and tear and you feel the virus spread through you. An insatiable hunger for human flesh grows within you. You slowly loose consciousness the hunger growing.
In the back of your mind you’re surprised as you wake back in your original world. Grogglily you roll over in bed to see your wife sleeping next to you. You watch in horror as the virus you’ve carried back to this world moves your body like a puppet, trapped in a small corner of your mind as you start a new zombie outbreak unable to control your own actions.