She grabbed his hand and ran up the tracks. Hidden behind the buildings to their right was an Underground line that briefly appeared from the depths before plunging into the shared tunnel ahead. Before disappearing out of sight, there was a section in the open air where the two systems ran parallel to each other.

Petrovich felt a drawn-out vibration deep in his bones. He pulled back, but she was irresistible. She wanted to see all the horrors invented for this day. A tube train hurtled into view around the corner of the building, shaking and rolling, sharp flashes of blue light bursting from underneath its wheels. It ran away from them, up the narrow-gauge track, it’s grafittied livery bright against the drab veil of dust it pushed through.

The rear door of the last carriage was open, forced by those inside, and there was a figure braced in the frame, feet and hands clawing at the sharp metal edges before being propelled out onto the rail bed.