Greg Bishop poses a most interesting question:
Was The "Father Gill" Sighting A Classified Aircraft?
Gill's own account stresses the almost mundane nature of the encounter. There were no high-G or other strange movements made by the object. It apparently hovered over the small church complex and then slowly disappeared into the clouds. (There were two sightings on subsequent evenings.) During the second event, Gill went inside before the craft had left. While some investigators have expressed surprise that anyone would leave in the middle of such an extraordinary sight, Gill and his companions had been looking at the UFO for over four hours just the night before.