Satelite sighting, changing directions to quick for normal.

Young kids walking to school. This occurred when we were in grade school. I don't recall the exact year or month. Sometime, I think during the early 1970's, when the government decided to save fuel by having us go to school in the dark. We would walk to the school and it felt like the middle of the night. All of the stars were out and even a satelite once in a while would go across the sky, in a straight line. That is when we were surprised to be watching a satelite going straight but it turned and went different with no noticable change of pace. South to north, steady, and then make an absoulte right angle and go east. South to North and then an immeadiate right hand turn to the East. We just looked at each other and did not know any words to describe what we witnessed. We got to school and other kids were talking about the same thing. A satelite going as normal and then turning 90 degrees. Without changing speed or anything. Just going and turning and then gone when out of our range of vision.
No sound. No colored lights. Just like a star in the sky, like our satelites. Moving like a satelite. But turning to a right angle just like that.
We never knew what it was. We were just kids walking to school in the dark.
Date is approximate.  Witness elects to remain totally anonymous.  The energy crunch occurred in the fall of 1973, so the event may have occurred during that year.  PD