"roar into" = ~ a pătrunde zgomotos și puternic (în cazul de față, cu efecte nefaste)

Sursa: "Roofs, platforms, buffers, steps of carriages, even the engines themselves, swarmed with soldiers. Their wild hurry to get home as quickly as possible brought death to hundreds of men - in tunnels and beneath bridges." ( http://www.austro-hungarian-army.co.uk/armistice.html )

Interpretarea: "'Roofs, platforms, buffers, steps of carriages, even the engines themselves, swarmed with soldiers,' reported one correspondent. 'Seen from a distance, each train looked like madly rushing swarm of bees.' Hundreds were thrown to their deaths when the trains roared into tunnels and under bridges, and their bodies littered the embankments on either side of the tracks." ( Sylvia Nasar - Grand Pursuit: The Story of Economic Genius )