the only person inside is a young male attendant. he's watching tv behind the counter as carrie enters. on the tv we see a newsman. we only catch fragments of what he is saying because the storm outside is affecting the tv reception.
simultaneously, as carrie watches this.  behind her on the tv screen.  a wave of interference scrambles the picture.
the attendant is reaching up, handing early the money from his pockets. carrie is seated in front of him.
the room fills with billowing down stuffing. as the stuffing floats to the floor it sticks to their hair, skin and clothes.
the last of the feathers fall like snow. the whole room is now white except for a red stain around the head of the dead attendant.