At that very moment Jon and Karyn where using the stone.
"So Karyn I've narrowed it down to ether Biff or Sara" Jon said
"Ok Biff, No Sara. Waite I've got it let's do a swap to them" Karyn said.
"Swap what?" Jon asked
"I don't know ether there sexes of lives" Karyn said.
Jon started laughing hysterically. "Biff as Sara's girlfriend. But you know what would make it even better if we made them lesbian lovers."
"I guess, but let's make it better. Make Sara butch and Biff a girlie girl" Karyn added.
"Perfect" Jon said as he picked up the stone "I wish that Biff Meadows and Sara McMillan where a lesbian couple until I wish otherwise, I wish that Sara McMillan was butch and Biff Meadows was a girlie girl until I wish otherwise"
Biff was compelled to look at his pocket watch as reality shifted.