Infectious Smile

You and some friends were at a party. you and your small group of friends and some other people lock yourselves in a room to do what all teens do at parties. You wake up the next night to some unsettling noises. you look through the peephole of the door and see the whole rest of the party (or whats left of them) scattered all over the living room. it is a bloody mess. then, all kf a sudden, a mortifying monster appears in front of the door. it seems to be making some sort of demonic sound. you wake them up in utter fear. you decide what happens next. yes mhmm. (you can also decide the names of everyone)