Biff was driving by a minute later, and saw her lying, unmoving, and in a very unnatural position, on Jon's lawn. He stopped, got out of the car, and ran over to her. Shaking her, he said, "Sarah, are you alright?"
When she didn't react at all to his shaking, despite her eyes being open, he said again, "Sarah! Sarah!"
A moment after that, her whole body went limp, and he heard her moan softly, as if she was in pain. "What's wrong? What happened? Are you hurt?"
She put a hand to her head, and said, "My head hurts like I just hit it hard on something, but I think I'm ok, otherwise. Can you help me get home?"
"But who did this to you?" he inquired further.
"I hit my head falling down right here; nobody else did it."
"But what were you doing here, at geek-boy's house?"
"I thought he might be able to help me with my homework, of course. Do you really think there's any other reason I'd be over here? Ewww."
He helped her to her feet, and over to his car. He then drove her home, and...