After WW1 the French had the railway cars that Germany surrendered in stored in a museum. During WW2 when France was preparing to surrender, Hitler ordered the walls of museum torn down and the railway cars returned to the exact spot of the 1918 armistice in order to humiliate the French.
The London Underground has its own implementation of the KERS (Kinetic Energy Recovery System), where the platforms are actually uphill from the surrounding track, so that the Kinetic Energy is turned into Gravitational Potential Energy, and recovered when the train leaves the station.