After living "in the box" along with everyone else, Expander wanted more.
Moving way out beyond the box, the box disappeared as she herself filled-up with the animation of Life Itself; something only possible when we stop referencing the box altogether so that the seeming "nothingness" fills us with everything..
She got out of the box for a moment only to realize that she still felt the ache for more.
After living "in the box" along with everyone else, Expander wanted more