Mark heard a knocking at his front door, his mind began pacing.. he doesn't remember inviting anyone over? not Cesar, nobody.. he'd slowly get up and quietly stand for a moment, finally, he'd approach the door and carefully look through the peep hole!

" who's that..? " The slightly anxious and paranoid guy thought to himself, still glaring at whoever(or whatever) the person (or whatever is there!!) was..