Saw a light moving very low and made a ninety degree turn at full speed.

My sister and I went out on my back deck and were looking West when we saw a bright dot going South to North that I took to be a landing light.  We continued to look for a short time because of the extreme speed of the object.  The light made a 90 degree turn and climbed out of sight in about one second.  The light passed between existing lights in the fore round and back round.  Unless I had been looking at just the right spot I would not have seen it.  At the time I was active Air Force reserve and the Civil Air Patrol so I have been trained to observe and report.  This is the only time I observed anything near this.
I saw something I can not explain and get quite angry when some quack starts telling fairy tails on TV, and makes everyone look like idiots.  If you dug a tunnel a thousand miles long, where did our government put the dirt?  We have a 15 or 20 miles and that dirt covers about 100 acres about 200 feet deep.  The 5% lunatic fringe is alive and talking.
Witness elects to remain totally anonymous; provides no contact information.  PD