Billion Dollar Limited (1942) is the third of seventeen animated Technicolor short films based upon the DC Comics character Superman.
Lois, hearing the commotion, climbs to the engine's cab and is immediately machine-gunned from the robber's car, keeping pace with the train to the side.
A stationmaster notices this when the train does not stop at the next station, and sends out a telegraph as signalmen change the warning lights to red, and for a railroad drawbridge to close.
Finally, Clark hears the news report through the Planet's telegraph, and discreetly enters the building's storage room, changing into his Superman costume.
Superman catches the lead car as it begins to roll backwards, and pulls the train up the hill himself, only to have the robbers toss several cans of tear gas at him.
Coughing and choking, Superman momentarily loses control, but regains it, marching steadily up the hill despite the robbers' continued machine gun fire.