Passing motorist intentionally drove thru locked quarry fence & vehicle got stuck. He walked to nearby top edge of high wall. Waukesha County Sheriff responded at 8:03 PM. 2 Sheriff Deputies tried to ""talk him down,"" but he jumped at 8:24 PM landing 80 feet below on quarry floor. We were notified at approx. 10:35 PM & we reported the incident to MSHA at 10:45 PM CST.