Jon looked down at himself and saw that he was the same, except ... he seemed just a tiny bit shorter than he was a second ago. It must have been an age swap that happened, He was about 6 months older than Karyn.
"Oh, sorry... wait did something just happen, I think i'm a bit taller" Karyn said. He looked up and saw her, standing only a few feet away. She did look a little taller, and maybe little older. But it wasnt by any more than a few months. If they had indeed swapped ages, then their shouldnt be that much of a difference.
He reached out and touched Karyn's hand and said "Swap."