I saw the same episode WI did but don't recall it as clearly in my mind. I know I faced a similar situation to what Lilith describes. In one of the apartments I stayed in recently it was clear that something extremely rough was happening in the apartment above me. I'd hear the screams, the sound of things hitting walls (never certain if it was a body), the sounds of feet moving harshly upon the floor. I never would have confronted the behavior in person for fear of my own life if I knocked upon the door. I considered phoning 911. I'm highly fearful of retribution and I always think somehow a perpetrator will know it's me calling and retaliate upon me in the future. I guess to sum it up you might just call me chicken shit!