Zoe's friend Sabrina Johnson (the one with all the piercings, as Karyn previously stated) stopped walking when she saw the stone that Jon had dropped. She picked it up and looked at it, not realizing what it really was. And unlike what all her friends would do, she didn't tell Jon that he had dropped it. Maybe the others could put up with Jon's negative attitude towards them, but Sabrina couldn't.
As they walked into the mall, Jon and his sister were still arguing about Hot Topic. Fed up, Sabrina whispered "I wish ..."
