When Jon's head cleared, he saw that he was still in his bedroom. He thought that he would get transported to someone else's body, but then he remembered that this was a body swapper, not a mind swapper. His mind stayed in the same place, while his body was taken somewhere else, within the range of the device. If only he knew what the range was.
He slapped himself in the head. Of course! Just use the stone! Sometimes, Jon felt like a real idiot.
He noticed he didn't have the stone, since it obviously moved with his body, so he said the phrase "Concrete Thong". Or rather he wanted to. It was strange, but he couldn't form the words.
When he finally looked at himself in his bedroom mirror, though, he understood why.
