I loved this when I first viewed it, and still do, and yet I have found that I misread it. I 'saw' an extra figure, on the left. It appeared to be a back view of the woman, seated, stretching forward with her arm extended back to the left. Yet this is all an illusion formed by the cloth, and her arm is in fact a leg, her shoulder, a knee. Anyway, it is in ribbon territory for me.
I think the fact that the dress is resembling a ghostly hand with sharp pointy nails is unintended, but it does give some dire foreshadowing as to what will happen to the ghostly heads in the near future...
the 'hand' is my favorite part of this image.