bright light approaching aircraft, aircraft responds with "something"

I'm not sure if it was 91 or 92, but it was in early April.  I got off the schoolbus and started walking down my street toward home.  It was a clear afternoon, and I noticed an aircraft flying at a high altitude. It made barely any noise, but the sun was glinting off of it so it attracted my attention. It looked like an ordinary passenger jet, except that maybe the wings were a bit longer and thinner than I would have expected, but not by much.
I watched the aircraft as I was walking down the street.  Eventually I noticed a bright light, which changed in intensity a bit, but did not appear to have any noticeable shape.  It approached the aircraft at slight angle, coming up from behind it on what looked like an intercepting at a greater but steady velocity.
After about a minute, a small contrail curled off the opposite side of the aircraft, and travelling much faster than the craft itself, curled around the front of the aircraft and headeded toward the light.  When the small contrail had quickly closed half the distance to the light, the light instantaneously changed speed and direction to a course five times as fast as it had been moving and almost 90 in a different direction.  It disappeared from view within a second or two without approaching the horizon..
Witness indicates that the date of the sighting is approximate.  PD