What connection might there be between Madame Schacter's treatment on the train and possible future events in the concentration camp?

foreshadowing · Night does not operate like a novel, using foreshadowing to hint at surprises to come. The pall of tragedy hangs over the entire novel, however. Even as early as the work’s dedication, “In memory of my parents and my little sister, Tzipora,” Wiesel makes it evident that Eliezer will be the only significant character in the book who survives the war. As readers, we are not surprised by their inevitable deaths; instead, Wiesel’s narrative shocks and stuns us with the details of the cruelty that the prisoners experience.

Two examples that I believe can be considered foreshadowing would be Moshe the Beadle return after his deportation and his ensuing warning about the actions of the Germans. Unfortunately, no one listens to what he has to say.

The incident on the train involving Madame Schacter's screams and her visions of a fore outside of the car may be intended to foreshadow the furnace and the burning of bodies.