Nov 23, 2016 6:50pm I was in my car, turning onto a street in Woodbury Heights, NJ, when I saw what I thought was a helicopter on approach to PHL, at about 500-1000 ft AGL. A second aircraft came zipping up from behind. I thought they were going to crash a few hundred yards away. The second aircraft, quickly decelerating, dove to the left under the first one, back to the right, back to the left again, like a fighter jet, and then made a sharp right bank under it and quickly disappeared towards Woodbury. I suppose a helicopter pilot might be able to make those sweeping movements, but I don’t think it could bugout and disappear that quickly. I do not believe that a plane could fly that slow and do that. Thirdly, you’d have to be an idiot to perform that maneuver so close together over such a populated area. It was fairly dark, all I could see was the large white light (ACFT #1) and a wing-shaped line of lights, about the length of a commuter plane’s wings (ACFT #2). This line of bright