I became aware of my sister, – lying without sense or movement on the bare boards where she had been knocked down by a tremendous blow on the back of the head, dealt by some unknown hand.

– Charles Dickens

Great Expectations, Chapter 15. Pip returns home from the Three Jolly Bargemen Pip to a horrifying scene in the kitchen of the forge. He is shocked to find that his sister Mrs. Joe has been knocked out by a vicious blow to the head from an unknown intruder.