Helicopter following 2 black "holes" in sky.Night. Clear conditions. A very loud helicopter with red and green running lights following close behind 2 very dark shapes about 200 feet off the ground. The dark shapes looked so black as to be holes in the sky. My guess is the 2 dark shapes were a type of stealth helicopter, which would explain how loud the identifiable helicopter seemed to be. The dark shapes could have been the profile of sophisticated military helicopters. Never seen anything like that, though. The blackness of the shapes was unnerving.((NUFORC Note: We spoke via telephone with the witness, and she sounded to us to be quite sober-minded. PD))