Bowling Ball-Size Rock Crashes Through Windshield On Interstate 75 KNOXVILLE, Tenn. -- A passenger in a sport utility vehicle was killed when someone dropped a rock the size of a bowling ball off an overpass on Interstate 75 in Tennessee. The rock crashed through a windshield in the early morning hours Monday near Knoxville, a television station in Knoxville reported. Authorities are interviewing residents in the area, looking for witnesses. A Michigan woman was seriously injured when a tombstone crashed into her car from an overpass along the same highway in 1995. The man who dropped it was sentenced to...