As they were walking along one of the streets in the futuristic city, Jon got bumped by someone and dropped the stone.
It turned out that the someone that bumped into him wasn't a someone at all. It was a robot. Stunned by the sight of it, Jon hadn't realized that the robot was robbing him. The robot grabbed the stone and zoomed away.
"Hey!" Jon yelled.
"Jon, what is it?" asked Karyn.
"That robot just took the stone!"
"What?! A robot?"
"Come on, Karyn. We've got to get that back."
And with that, they chased after the pick-pocket robot.