Swing was pottering through the Rani's TARDIS, determinedly sorting everything again, because the Rani liked to do her own reordering. Which made absolutely no sense to Swing. Currently, he was arranging a collection of chemicals in order of valency. Because this, clearly, was the best way to apply maths to the situation. Clearly.
Except now he'd lost something. "Rani...whereis the... hydrochloric acid? Youcan't... seriously haveused it... all. Don'ttell me... you'veputit..." Pause. "Oh...it's...Whyonthe...Disc isit... here?"