He's frustrated and worried because you don't answer your phone and you were supposed to be at home hours ago. 'Maybe something happened to her. No, she just has some extra work. But why doesn't she call me back? Maybe she's with someone. Is she cheating on me? No, she could never. Maybe one of her friends needed help with something. Maybe...' He keeps thinking about all these crazy scenarios until he hears rattling from the direction of the front door.