One night my family was driving home from Yosemite, it was dark and the roads were winding. Our headlights were the only light around. 

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Then I saw a figure in a long black cloak, but it disappeared as soon as I saw it. But it continued to appear and every time it did, it got closer and closer to the car. 

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Eventually we reached a town and it didn't appear anymore. But a few days later when I mentioned it to my friend's grandmother, her eyes went wide and she told me when she was a young girl her grandmother would tell her stories about people who had sold their souls to the devil. And if they wanted one last chance to not go to Hell, they could return to earth to find someone to take their place.