No one knows who this person is, it just "mystically runs" passed at random times, too quick for you to see him (legend has it that it is a male - apparently)
Some have heard it cry out strange noises and cries. For example: "oooooooorly"
This could be some sort of distress call or perhaps a mating call to his true love - who, as legend has it, is the reason this person is running around the country.
2. One that runs in a mystical or stealthy manner
2 Person A: "Yo, yo, s'up guys"
Person B: "Hey how'd joo get passed security"
Person A: "Just call me a Mystic Runner"