"It was quite good at screws before I soniced it," the Doctor assured her, taking them through another turn and then a one-armed slide that put them at arm's length from each other. "A very capable ordinary screwdriver. And now it's a very capable non-ordinary screwdriver. But nobody can do everything; maybe I'll add a proper screw setting one day."

Well if she wanted to push the limits of the music he was happy to participate. As far as the Doctor understood, the point of swing dancing was to move your feet as fast as you could. Which was a goal he approved of. So he executed a neat little series of dance steps, pulled her back in for another triple-step turn, and then repeated the process, eager to see how she met the footwork with her own.