OK....cocinelle and sue....we do not know whether or not you or sue hit the back of her head or the front.
If it was the back, in this case, then how can one get a "black eye",,,bruising of the eye as opposed to a "blood shot eye " which are quite different animals.
Now, if it was a blow to the front of the face...black eye, immediately, headaches and numbness.....what comes commonly to mind?...a punch to the face.
cocinelle did you "black eye" or "bloodshot eye" come on directly after the incident?