"Sarah, put that down," Jon demanded. "You have no idea how dangerous it is."
"It's not dangerous in my hands," she said. "I've already put it to good use."
"You've already wished for something?" Jon asked, worried about what she might have wished for.
"Yes. And I'll keep on using my stone however I want."
"It's my stone," Jon corrected her.
"Not anymore. I wish I was back at my house. Toodles," she said, waving and smiling. The stone glowed and Sarah disappeared along with the stone.
"Damn it!" Jon yelled.
As Biff and his friends left the gym, a woman walked by, who he recognized as Miss Waters, a 23-year old intern teacher at the high school. When she noticed him, she turned and said "Hey, I thought we had plans tonight. What are you doing at the gym?"
"What?" Biff asked, not sure what she was talking about.
"Our date? Don't tell me you forgot."
"What are you talking about?"
"Biff!" a girl yelled. He turned around and saw an eleven-year old girl charging towards him. "I thought we had plans tonight."
Then one of Sarah's friends (Melissa Smith) walked towards him, with her two friends lagging a bit behind. "I thought we had plans tonight."
"Man, what's going on?" Randy asked, as he saw more girls and women walking towards Biff, saying the same exact thing, acting as though Biff was their boyfriend.
What Biff didn't know was that his wish (that every girl that attended school was just like Sarah) had come true. Now every girl (in this case, every female) who attended any school (including the high school), whether they were a student or part of the faculty, had Sarah's mind. It could be said that a person is not what they look like, but rather a sum of their memories - their mind. They had all become Sarah, mentally.