It’s exciting to see Shyamalan on such confident footing once more, all these years later.
The freight train pulls out of a siding with no engineer on board and accelerates to 70 m.p.h., and you see how Tony Scott's "Unstoppable" gets its title. The movie is as relentless as the train, slowly gathering momentum before a relentless final hour of continuous suspense. In terms of sheer craftsmanship, this is a superb film.
The trouble begins when an engineer (Ethan Suplee) dismounts after thinking he had brought the train to a full stop. He hasn't. When he sees the train slowly pulling away, the look on his face is adequate to fuel the next several minutes. At first, it's assumed that the train is a "coaster," but no luck. It's under full throttle.
Scott tells the story from several points of view. In the cab of another train, a longtime engineer named Barnes (Denzel Washington) is breaking in a new man, Colson (Chris Pine). In the station yard, a yard master named Connie Hooper (Rosario Dawson) is in charge of dispatch and operations. In the railroad's corporate offices, an executive (Kevin Dunn) is concerned mostly about the cost of losing the train, which seems harsh, since it is carrying hazardous materials and is rocketing straight toward the heart of Scranton, Pa.
Overhead, news choppers circle, providing a live TV feed that Scott intercuts with the action. That allows him a plausible way to provide an overview and narrate the action; a similar device was used by his brother Ridley Scott to help us follow events in his "Black Hawk Down" (2001).