You're in an Apocalypse, it has been happening for 4 Months now.

You were walking, you were holding a gun just in case a zombie comes and attacks you all of a sudden. You saw a man standing inside a building, on a shadow. You couldn't quite see if he is a zombie, or a survivor. You slowly walked towards it to get a better view. It was a Survivor, he was standing in the shadows to make sure zombies think its a zombie too.