A friend of my son on the way to a hunt brought by a new 3rd gen. night scope. at 10:40pm on a clear night in the country west of fort worth, i was looking through it and pointed it about 80 degrees up. i observed what i thought was a satellite crossing the sky south east about 10 seconds when it suddenly made an acute angle turn west, an impossible turn by any flying or space vehicle that i am aware of. i watched it continue west until i lost view. it astounded me to witness what i thought was an impossible maneuver. the picture i am attaching is a mock-up of the event.