"Hi, Jon," Karyn said, walking into the room. "I thought I'd come over early. Maybe use the stone?"
"I don't think that's a good idea," Jon said.
"Come on, Jon. Just one wish?" she whined.
"No, that's not what I mean. Look," he said, showing her the obsidian-looking stone.
"Okay, what is it?"
"It's the stone. Well, I mean, it's a stone, not the stone. I don't know how, but sometime during the night my stone got replaced with this."
"Does it grant wishes?" she asked.
"Yeah, but ..."
"Then what's the difference?" she asked, grabbing it from Jon's hand. Before Jon could stop her (although he had no idea if the stone worked any different than the normal stone), Karyn said "I wish ..."