777's throttle slid back from the forward idle position to the full backward position, Notch 8, full power. But when Dewey supposedly thought he set the independent brake he forgot to do so without air brakes, Which 777 didn't have at the time due to a disconnected air hose, the brake was useless.
Instead, due to a misaligned switch, 777's temporary engineer, Dewey, decides to jump out of the cab to run ahead of 777, throw the switch, and attempt to climb back on. Originally to the schedule, 777 was supposed to be moved from Track D16 to Track D10 in AWVR's Fuller Yard to make way for the Railroad Safety Campaign train with a field trip that would arrive later that day. The train consists of 12 closed hopper cars filled with different types of grain, 8 tank cars filled molten phenol, a toxic, flammable chemical used in the manufacturing of glue and other art supplies, 3 open hopper cars filled with coal, and 2 bulkhead flat cars carrying large steel pipes. In the film, 777 is double-heading a mixed freight train with one of its sister locomotives, AWVR 767, another AC4400CW. Little is known about AWVR 777's history and what it did before the events of Unstoppable, but it can be stated it was built at a decade, to work for AWVR railroad operations before the events happened. Courtesy of the heroic actions of veteran engineer Frank Barnes and rookie conductor Will Colson, the train was stopped before it could cause any more fatalities beyond when it derailed a lash-up and the engineer was killed, shortly before Barnes and Colson began their pursuit. It was a runaway train carrying hazardous chemicals known as Molten Phenol from Fuller Yard towards Stanton, Pennsylvania. CSX 8888 AWVR 777 is an AWVR (Allegheny & West Virginia Railroad) AC4400CW in the 2010 action/thriller movie, Unstoppable.