'The object appeared to be circular, and was stationary about 100 feet above the ground. '
From post #2841:
"Since about 1948, the alien devices are engaged in a variety of tactics. Isolating individuals or small groups of people, showing themselves to those people in a dramatic or sometimes traumatic fashion, so that there is no mistake about their otherworldly nature, and then taking off in an instant"
Several Navy officers who witnessed the now-famous Nimitz UFO encounter in 2004 say "unknown individuals" showed up after the event and made them turn over data recordings and videos, according to Popular Mechanics.