I saw an oval shaped object that stood in the air and made square turns and left almost straight up at thousands of miles per hour. I

I was flying to McAllen, TX, from Houston a little after 22:00.  Weather completely clear.  
An object completely different from others drew my attention.It was oval in shape and yellowish in color.  It was at my altitude-7,500'   It stood still in the air.   Not getting larger or smaller.  
I eased my nose slightly to the right to line him up to see better for a min.  He made a square turn to my left and stopped again.  I lined him up again.  Same thing again.  
Three times this happened.  He didn't like me in his face even a little bit. 
He was perhaps 2 maybe 3 miles in front of me.  Always making square turns.  And standing perfectly still in the air.  At the end of the 4th maneuver he indicated that he was growing weary of this tag and go seek and he departed to the southeast at an angle of close to 70 to 80 degrees (very near straight up but not quite) and was gone out of sight in less than THREE SECONDS!  Straight line-no curves.  
There were NO clouds in the sky.  I have never seen anything like this before or since.  And I don't care if you believe it or not.  I know what I saw.