Driving home one cloudless night as a passenger we saw the stars black out from my right side (horizon) moving to directly above us. what got my attention was a darkness, the stars where blocked for just a split second as it moved from the right. then this triangle thing stopped in an instant above us blocking out the stars in a perfect triangle now moving the speed of the car, I saw stars disappearing on the leading side of it and stars repairing behind it. After about 30-40 seconds of this thing directly over us it shot to the left, just blocking out those stars as fast s when it came in. the driver and i only talked about it one time several days later. The whole thing still bugs me.