 CONT: In art class you see Mrs. Collins pick up some papers and a  wooden tray, then turn and talk to Juliet. The wooden tray Mrs.  Collins picks up has a circular carve in one end of it. In one shot  she is holding the tray so the carving is facing her, then when the  shot changes she is suddenly holding the tray the other way, so the  carving is facing away from her.