12/7/2017 7:45pm. driving eastbound 35 mph. on north shore dr. unionville in. i brake abruptly as i notice something above the road in front of me.Im confused because the object is so low to the road and stretchs across the entire road, i for a moment think im about to drive under a train tressel. however there is no train track yhat goes over the road in this particular area. i can see a huge black outline of a massive hovering object. my head lights reflected some light off the object and i notice 2 white circle vent fans on the underside of the object, directly above me. im already directly underneath the object by the time i get the vehicle to a stop. i had my truck window cracked and i suddenly hear this very very loud noise as if mass amounts of air under pressure had been released. i felt the air move. at this point became incredibly frightened and drove away as fast as possible. i didnt see it again after that