Residents in the north of Norway are mystified by a bizarre UFO that flashed over the sky. Pictures and video footage of the strange swirling blue light in the sky do not help much in the way of determining what caused the UFO. The description of how it happened is pretty incredible: The phenomenon began when what appeared to be a blue light seemed to soar up from behind a mountain. It stopped mid-air, then began to circulate. Within seconds a giant spiral had covered the entire sky. Then a green-blue beam of light shot out from its centre - lasting for ten to twelve minutes before disappearing completely.