Doppelgänger

In fiction and folklore, a doppelgänger (German, literally a “double goer”) is a paranormal double of a living person. It also describes the sensation of having glimpsed oneself in peripheral vision, in a position where there is no chance that it could have been a reflection. Doppelgängers often are perceived as a sinister form of bilocation and are regarded by some to be harbingers of bad luck.