How we cite our quotes:
In a single quick movement the boy scrambles to his feet and dodges out of range. "We will kill you all!" he shouts. He turns; deliberately trampling the potato bed, he ducks under the wire fence and retreats toward Petrus's house. His gait is cocky once more, though he still nurses his arm.
Lucy is right. Something is wrong with him, wrong in his head. A violent child in the body of a young man. (23.17-18)
Lucy, David, and even we as readers can see that violence isn't just about actions, but also thoughts. Pollux doesn't just act violently; it seems that he also thinks violently.