2004 CHEVROLET SILVERADO, TOWED A TRAILER. THE TRAILER BECAME DISCONNECTED AND TRAVELED OFF THE LEFT SIDE OF THE ROADWAY. THE TRAILER STRUCK THE CONCRETE WALL AND FLIPPED OVER. BF THE PIN WHICH HELD THE HITCH INTO THE RECEIVER FELL OUT AND WAS LOCATED. THERE WERE NO CHAINS ON THE TRAILER. (OHIO TRAFFIC REPORT # 10-0698-90)*JB