Seeing a train just made me want to watch Double Indemnity. I've never seen La Bete Humaine.
I wouldn't say the train was "realistic," though in the context of 1938 maybe it was. The train felt like a character. We were seeing its POV, and it felt like the train was completing more of a task than the men on board.
The screech of the train tracks and the destructive way they had to switch tracks (bringing up those chains and then beating that box) seemed dark. And of course, there was literal darkness when they went through the tunnel.
It definitely peaked my interest as to who are