An Unlikely Apocalypse

At first, it had seemed possible to continue moving through the desolate landscape on foot, but soon, it was obviously impracticable. Many bad things happened to the people travelling in traditional, bipedal mode: Ether-snakes. Entropic planter fasciitis. Electric sand. (And that was just the 'e's.)

Before the catastrophe, everyone thought that Edith and Sally Womble had been insane, going everywhere via giant rubber ball.

But as with all visionaries, they were ostracized, and...