Jon looked down at himself and saw that he was in Karyn's body! It must have been a body swap that happened.
"Ummm... Jon what's going on?" he heard his voice ask. He looked up and saw himself standing just a few feet away. The facial expression was pure horror and confusion.
"Karyn, listen to me. It's okay," Jon said. It was so weird hearing Karyn's voice when he was speaking.
"Okay... but why am I you... and vice versa?" Karyn asked, settling down, but still freaked out.
Jon didn't bother giving her (or was it him now?) an explanation. He (or rather she) reached out and touched Karyn's newly-acquired hand and said "Swap."