Who Hit Rocky?

The poll at right refers to the following Beatles lyric:

Somewhere out in the black mining hills of Dakota, there lived a young boy named Rocky Raccoon/
And one day, his woman ran off with another guy/
Hit young Rocky in the eye/
Rocky didn't like that, said I'm gonna get that boy

We later learn that Rocky's girl's name was McGill, and she called herself Nil, but everyone knew her as Nancy. Her man called himself Dan.

Who hit Rocky? Suggestions welcome in comment form.