Freight docking

At the meeting of many rails, in air so cold that sound travels for miles down the tracks, one engine abandons freight and pushes it into the care of another. Energy shoots through the metal cars, a thunderclap chain reaction at a speed that belies their lumbering appearance and slow starts. Humans made trains for their own small-minded purposes—to move gold and wood, to avoid the menace of stillness—but the sound effects are divine.