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A train is heading west and a fly is buzzing along the tracks heading east. The train collides with the fly. The fly at some point must go from heading east to heading west, so at some point its speed must be 0mph.
As the fly is in contact with the train, the train must also be going 0mph at this time.
the fly is distorted, but so, to a much lesser extent, is a very small portion of the front of the train