Coming to theaters next month is the horror-thriller Mama, executive produced by Guillermo del Toro and directed by Andres Muschietti. The story actually started out as a short film, which was what convinced Guillermo del Toro to get involved in this feature. Today, the full short Mama has been released, with an introduction by Guillermo del Toro, who calls it, "one of the scariest little scenes I've ever seen." Check out this short before Mama hits theaters January 18.