Jon decided that what he really needed to do was check up on his mom, to see how she was doing at work. Since she worked at the same time as Jon went to school, he'd have to check it out during that time.
His mom worked for a law office downtown. She was a secretary that handled a lot of the paperwork. Jon wondered if she still had that job. And if she didn't, what kind of job did she have?
Thinking that he had plenty of time during his lunch break, Jon held the stone in his hand and said "I wish that for the next 20 minutes I would be where my mom works and that during that time, no one there will notice my presence."
The stone glowed and Jon disappeared from the restroom.