Someone forgot to put the potassium bromide in the WIOX tea. Jenny, Steve and Julian tumble backward down the barber-pole of time to the school playground; where they huddle in the corner for an hour tittering over the diagrams in a first-form human biology textbook. It's a scrotum supernova. The squeals of delight prove a little taxing for their gerontic crevices, so there's leakage and some staining. But nothing a hot wash and Persil won't put right. There's buttered toast, sticky fingers and lashings of ginger beer.