 A new scene with Regan at the hospital receiving treatment to diagnose her   "unusual" behavior.  The doctor tells Chris MacNeil that Regan told him to   "keep his hands away from her Goddamn cunt." This scene sets up her bizarre   behavior earlier and clarifies the scene where Chris tells Regan "its just   like the doctor said, its just nerves.  You just take your pills and youll   be fine" 