The Unknown Zone: Return of the Black Stick Men

What are black stick men?  They are totally black, thin, stick figure drawings, such as teachers would make in kindergarten. They have been reported as between average height to impossibly tall. Their heads are just a black circle with no facial features being discernible. They are totally two dimensional, without any depth. Usually they’ve been sighted walking along roads at night, or at transitional times such as twilight or just before dawn.