" So, you admit you’re an animal killer.”
She gaped. Did he just say that? Did he actually . . .
“Go for it, Addie!” Tay yelled.
She glanced up. There was the ball plummeting at a fierce velocity, triggering a burst of adrenaline. And there was Kris, the words still on his lips.
Her fingers rolled into a fist. She threw her arm back and made contact, executing a follow-through to ensure that the sucker landed—smack!—square in the face.
“Whoa!” Ed yelled as Kris went backward, hands over his nose, from which streamed a line of bright-red blood.
“Awesome!” Tay slapped her on the back. “You knocked him out cold. We won!”
Addie lifted the net and went over to where Kris was sitting in the mud, blood on his shirt. “Is that enough closure for you?” he asked, wiping blood off his chin.
She breathed heavily, trying to think what she thought, and was delighted to realize that, actually, it had helped to knock the stuffing out of him.
“Yeah. That’ll work. See you tomorrow, at noon.” She turned and marched off. “I’m going back to the lab. "

― Sarah Strohmeyer , This Is My Brain on Boys