"No," replied Biff, shaking his head, "No, I can't ask you to do that for me. If I was the Biff you knew then I'd mess around with your mind, but I'm not him...I couldn't do that to you. You've done nothing to deserve having your life turned upside down."
"My life's already upside down," replied Jon, "who knows what other changes have occurred?" He paused and thought for a moment, "And maybe I do deserve it...metaphorically speaking I have effectively murdered your boyfriend and taken his place; for you and this world that would be undoing that."
"No," said Biff, "you didn't do that; the stone did. I can punish you for that."
"You know," thought Jon out loud, "We don't actually know I'm right...maybe my memories got altered somehow."
Biff looked up at him a and stared "why would you wish that?"
Jon shrugged "No idea."
Biff picked up the stone "I wish I knew what was the last wish Jon had made." He closed his eyes for a second and shook his head "you didn't alter your memories, this is an altered reality created by the stone."
"Damn," replied Jon.
"You were hoping for the memory thing?" asked Biff shocked.