She is hanging from a boxing punch-bag bracket bolted to the wall. Because the neck eyebolt is behind her center of mass, a sturdy cardboard box (the horizontal white rectangle) of just the right size pushes between the wall and the small of her back so she is upright. Otherwise she hangs in a gorilla-like pose.
You can see a larger copy of this photo by following instructions appended to all my messages on the doll forum. See the doll forum link on my Links page.