In the morning, Jon met up with Karyn and told her about the wish.
"You wished for something interesting to happen ... and you didn't say what? Jon, it could be anything," she said. "Like you could grow boobs."
Jon looked at her. "I know. It was an accident. I just wanted to warn you. Keep an eye out. Everything has been boring since last night, so I figured it might happen at school. Since it wouldn't be interesting if I didn't know about it ... it's going to be obvious." (Well, obvious for Jon.)
They went their separate ways. Karyn headed to the library and Jon headed to his locker. And it was when he was putting his stuff away in his locker that the first insult-related change happened.