 CONT: During the birthday party for the Baron, Truly pretends to be  a doll who dances on a spindle within an opened large box of  mirrors. This box is visible on the floor for all the guests to see.  When Mr Potts appears as his own form of a doll rising from a box,  he starts to dance, the camera pulls back and Truly and her music  box are nowhere to be seen. When Mr Potts goes over to sing his duet  with her, suddenly Truly is visible again.