A CSX EMD SD40-2 rolls out of a train yard in Walbridge, Ohio, with 47 freight cars, including some tank cars with flammable chemical, after its engineer fails to reboard it after setting a yard switch. It travels south driverless for 66 miles (106 km) until it was brought to a halt near Kenton. The incident became the inspiration for the 2010 film Unstoppable.

CSX Transportation, known colloquially as simply CSX, is a Class I freight railroad company operating in the Eastern United States and the Canadian provinces of Ontario and Quebec. Operating about 21,000 route miles (34,000 km) of track, it is the leading subsidiary of CSX Corporation, a Fortune 500 company headquartered in Jacksonville, Florida.

The EMD SD40-2 is a 3,000-horsepower (2,200 kW) C-C diesel–electric locomotive built by EMD from 1972 to 1989.

The CSX 8888 incident, also known as the Crazy Eights incident, was a runaway train event involving a CSX Transportation freight train in the U.S. state of Ohio on May 15, 2001. Locomotive #8888, an EMD SD40-2, was pulling a train of 47 cars, including possibly two cars loaded with hazardous chemicals, specifically molten phenol, a substance used in dyes and glues, and ran uncontrolled for just under two hours at up to 52 miles per hour (84 km/h). It was finally halted by a railroad crew in a catch locomotive, which caught up with the runaway train and coupled their locomotive to the rear car.

Walbridge is a village in Wood County, Ohio, United States, within the Toledo metropolitan area. The population was 3,011 at the 2020 census.

A tank car or tanker is a type of railroad car or rolling stock designed to transport liquid and gaseous commodities.