Home security camera, living room, evening. Asian family of three sits on floor facing large beige curtain covering window - mother, father, small child between them, relaxed atmosphere. Everyone talking calmly. At 8 seconds curtain suddenly jerks violently to the side as if invisible hand yanks it, fabric whips across revealing dark window behind. Family freezes mid-conversation staring at curtain. No wind, no open windows, air conditioning off. Curtain hangs still now. Father stands slowly, ap