You where watching tv in your room (upstairs) and a message from the FBI "there have been numbers of missing people they have been found alive but something is off with them, so we have come to the conclusion that doppelgangers are roaming around, lock your doors I repeat lock your doors" someone knocks on your front door, you where not expecting someone you don't open the door, and you hear someone break your front door down, you hear it say "I AM COMING FOR YOU"