Two black objects, shaped like a chemistry beaker. one in front going in a straight line, stop (hover?) 2 times. the other object, same physical characterists, trailing the first object. second object did not move in a straight path; it would dart behind left,right, directly behind. when the first object would stop, the trailing object would also hover in it's position. i was sawing up fire wood when i looked up because i heard an airplane. we are in the flight path for pdx. i saw the comercial plane which was south of these objects. these objects went from the west to the east and just faded away.