I observed a dark gray colored craft. i had stopped at a stop sign. to my right. i looked up just above tree level and noticed a dark gray object hovering . sitting still. the object seemed to be watching me. no noise or lights coming from the object. it was almost dark but not quit. i live in a very rural area. there were no other cars or people around. just some cows. the craft seemed to hover as i sat still at the stop sign for about 3 min. then all of a sudden the craft took off with exceptionally high speed . like a rocket. but, instead of the craft ascending toward the sky it went down into a pasture and behind a hill or terrain .It was so fast if you blinked your eyes you would have thought you were dreaming. i never saw the craft again after this incident.