If the witness description of this object is accurate, then it must be a genuine unknown. The witness offers a careful description of the movements of the object that would be impossible for a balloon, and adds a detail familiar from many sightings and close encounters: extreme agitation from nearby animals. Our photo experts feel that this is a genuine mystery.
The object caused sheep in the area to start making what to the ear of the witness were unusual, high-pitched sounds of terror. The sighting took place in Wales, where sheep mutilations have been a worrisome constant for well over a hundred years.