Gary Has The Rock

"What IS this thing?" "It's a magic rock," Jon told him, now totally cooperative. "Magic rock?" "It grants unlimited wishes. But there's a catch." "I thought there might be." "You can't reverse previously wished wishes." "I see. And why did you turn my son into a girl?" "He was beating me up. I thought he deserved what he got. I'm sorry, Mr. Meadows. I didn't think about Biff's family." "You could have just wished that he'd leave you alone. Not THIS." "I know, but at the time it seemed so funny. Except now. I'm not sure why, but it doesn't seem all that funny anymore." Gary thought for a moment. "I wish that for the next thirty seconds, Jon would think that he's Biff." The rock flashed. "Dad," Jon looked around. "Where are we? This isn't my room." "No, it's not." "Dad, why are you smiling?" "Just having a bit of fun with the rock." "Rock? What rock? What's going on h...?" The thirty seconds were over. "Mr. Meadows? What happened to me?" "I think I'm going to enjoy this."