Slowly Jon got up and decided to touch...
It didn't matter what he WANTED to touch. His shoulder had a sudden itch and he absently scratched at it with his hand. However, since he was wearing a t-shirt, his hand touched his t-shirt. He realized what he was doing a fraction of a second before his fingers touched the t-shirt, but it was too late by then. There was a small pop as he disappeared and a t-shirt fell to the floor in his place.