I was on duty and was talking to an employee on site, when we could not help but notice a yellow opague round wobbly object falling from the sky just over the main office, where we were. This object fell, then stopped and immediately turned into a multi-colored striated cylinder of fire about the length of the main mill, that appeared about 1500 feet above the ground, both ends of which were perfectly and precisely contained within this structure, yet it appeared to emanate a great deal of noiseless energy as it headed in a northeast direction over my work site,emanating a neon green splattered rope of light as it disseminated just past the production area, as if disappearing into an opening in the clear night sky. I was surprised to see this object, but immediately reported this incident to law enforcement as I also had a witness and wanted to be sure that no fire was generated in the area, as part of my job involved fire prevention at the time. This event occurred within about 9-10 seconds. As an observer, I did not feel that this event affected me in any way.