He exhaled. The simulation kept running, Kofu station now five kilometers away. He checked the performance metrics overlay: . CPU load 14%. Physics ticks 1,000 per second. Adhesion error margin 0.3%.

He could have braked. But a real driver on that real train? At that speed, on frozen rails? You hold. You sound the horn. You accept the impact.

That wasn't track noise. That was impact . Two seconds later, a cow—a real, simulated cow—stumbled from a snowdrift, invisible from the cab until the last moment. Build 11779437 had introduced random wildlife encounters. No one told him.