Black thunder, in the distance, swells in velvet folds. It bursts forth all around us. We rush headlong, as if awaiting a god. We are packed inside a glassy glitter. We gather momentum. We hurtle into a black chasm and speed with a hollow din far underground, hanging on to leather straps. With a pop the amber lamps are extinguished for an instant, during which flimsy globules burn with a hot light in the dark—the bulging eyes of demons, or perhaps our fellow passengers’ cigars.

