The train carrying goods stopped at the platform of Chernobog train station, and Kallen used her agility to leap off the train before it came to a complete halt.
The speed of trains in this era is not fast, so although this action carries some risk, it's not unusual for those who often deal with trains.
For some older folks who deal with trains, it's normal to run a few quick steps on the platform to catch up with a train or to jump off one that's still moving.
But even so, Jon, who jumped down with Kallen, still nagged her, "Kafka, jumping like that is really dangerous. What if you don't land steadily and fall over?"
"Alright, Jon, stop nagging like an old woman. The train's speed has slowed down, I won't fall," Kallen was clearly somewhat annoyed by Jon's excessive concern.
Though knowing it was out of kindness, Kallen disliked the feeling of being overly protected.