For just a moment Jack was full of the worry that he'd done something wrong. Worried that he'd said things he shouldn't.

But then the Doctor smirked, and that worry faded. If it had shown on Jack's face, it had only been for a moment, and then that was replaced by realisation and a grin along with it.

"Oh I see," he said, turning his head to watch him approach.

"Well in that case. What do you want to do to me?"