Jon had spent the entirety of his night worrying about what his wish did. He had discovered early on that the stone would not reveal what was done, as that would make everything less interesting.
Finally, after hours of fretting, he finally drifted off to sleep.
The next morning, he woke up, still wondering what his wish had done. He got out of bed and began getting ready for school. Maybe something would happen that morning, if it hadn't already happened.
After getting ready for school and properly dressed, he headed downstairs for some breakfast. In the kitchen, he saw his mom (Linda), his Goth sister Zoe, and his little brother Mikey. His brother apparently had just woken up, since he was still dressed in his pajamas. But Zoe and his mom were fully dressed, ready for their day.
Jon grabbed something from the refrigerator, planning on just having a quick breakfast. And that's when someone in the room had a headache, one of the first symptoms of the Blank Slate Disorder.