Thomas & Friends (1984)

S1E25 Down the Mine

Gordon faces embarrassment after tumbling into a ditch, with Thomas playfully mocking him about his "strange, musty odor." Later, Thomas is tasked with transporting freight to a historic Lead Mine. Although the ground below the overhead tracks is stable enough for trucks, it cannot bear the weight of an engine. Undeterred, Thomas disregards the "Danger" warnings posted nearby.