Biff looked at Sarah and pleaded. "I wish you would help me ... please."
Little did Biff know, in addition to getting Yukio's timid attitude, he got something from Sarah too. Suddenly, he hated what he was wearing. It looked so ... boyish. Maybe his girlfriend would let him borrow some of her clothes. It was a known fact that Sarah kept an extra outfit in her locker, just in case her clothes got damaged in some way.
He turned to ask her about it, but was suddenly shocked to see that Sarah had changed. She was much more muscular than normal. In fact, she looked like a weight-lifter. She stood in front of Biff, protecting him from his pursuer.
Jon ran right up to Sarah and then halted in his tracks. Since he didn't hear Biff's wish, Jon thought that Sarah was always an amazon of a girl.
"Where you going, pipsqueak?" Sarah asked. She punched her right fist into her left hand. It was odd, but ever since Biff's wish, she felt totally different. And now with Jon confronting her, she felt stronger and more aggressive than she had ever felt before.
"I ... uh ..." Jon was totally out of his league here. Sarah would beat him to a pulp. But Biff's first wish compelled him to get the stone back, regardless. "Biff took my stone. I want it back."
Biff hid behind Sarah. He really hoped Jon would just leave him alone.