The problem with "movement" is that it is indecisive; not committed to represent an action...but trying to BE the action. And once natural laws (physics) have begun to represent you, then you have given-in. With some strife it is possible to reverse that relationship and let an "action" quite be the CAUSE of the representation (or the effectiveness). But you gotta be into strife...if not, let the sculpture run around all over the place as it wishes.
But I do love rebar.....freeze that thing in its best spot (you decide) and it will rock for sure.