Daylight viewing of low oval metallic object gliding toward a second identical object, pausing then simultaneously shooting skyward

July 1968 Sunday evening.  I was 13 years old at the time.  I went to fill the bathtub and get ready for school the next morning.  While filling the tub, I went to close the window shade. This was about 6:30 -7:00 in the evening and was still daylight outside.  As I looked out the window my attention was drawn to a metallic looking oval object in the distance, moving very slowly along from my left field of view toward the right.  From my location on Maple Avenue in Metuchen, I could see this object was gliding slowly above the train tracks, power lines and tree line that run parallel to what was then the Pearl Street parking lot.  
I called for my mother downstairs to come and look.  At the same time another identical object appeared on the right, moving slowly left toward the other object.  They both slowly came to a stop in front of one another, then simultaneously shot straight up at such a speed that only streaks of light were visible - similar to the “hyperspace! ” effect now seen on Star Trek.  Both oval metallic looking objects had no other features that I could see, and I had a clear view.  My mother did not arrive in time to see what I was shouting about.
I attended Franklin Junior High School in Metuchen at that time.  My homeroom teacher, who I believe lived in Union, posted a photo of the same image on the classroom bulletin board. He said he photographed it from his backyard which overlooked a reservoir.  I remember looking at it and seeing the date of August, which would have been a month after my sighting.  Years later I wrote him and left a phone message asking if I could have a copy of the photo, however I never received a reply.
The only other possible related incident occurred when my parents' next door neighbor - a retired policeman - phoned them to come outside and look at an object above Campbell School which was the next street over.  I was at a friend’s house and my mother phoned me to come home right away. She said the round object moved back and forth in a sort of zig-zag motion then “took off”. This happened around the same time, but I don’t know the dates.
Witness indicates that the date of the sighting is approximate.  PD