The traffic roared up and down the road, never slowing, never stopping. There are no traffic lights in the Nightside; vehicles that defy the laws of physics every day have no time at all for the rules of the road. Anything and everything travels through the Nightside, from places best not considered to destinations beyond our comprehension. From horse-drawn carriages to deep-freeze super-tankers, to black taxi-cabs that dart back and forth, duelling with swivel-mounted machine-guns over disputed territories . . . Super-streamlined cars from alternate futures, ambulances that run on distilled suffering, and articulated transports carrying unknown loads on unknowable journeys. While overhead, something the size of a dozen planes sweeps slowly by, its grotesque shape blocking out the stars in the sky, with not even a murmur of flapping wings.

So if you want to cross from one side of the road to the other, you either have to do something quite appalling to a chicken . . . or do what everyone else does, and use the underpass. Walk down a flight of steps, travel through the simple concrete tunnel that passes beneath all the havoc and horrors of the traffic above. You’re a hell of a lot safer in the underpass than you ever are up on the street because all the underpass tunnels are monitored and protected by the Authorities, in the general interest. Can’t have the tourists coming to any harm before our many and voracious businesses have squeezed every last penny out of them.

I strolled through the brightly lit corridor, and unlike on the street above, everyone was calm and polite and not in any way violent, and gave everyone else lots of room. Because each and every underpass is patrolled by unseen trained poltergeists.