One rock stops two trains

I heard some scanner traffic where 4944 told the dispatcher he'd just had someone throw a rock at his windshield as he was leaving Liberal, Ks westbound. The rock shattered the engineer's side windshield and it was difficult to see through, especially heading west into the sun. The dispatcher contacted 8654 west who was behind 4944. 8654 was a Ztrain with a 2x1 setup and the dispatcher asked if his second unit was facing forward. 8654 said it was, so it was decided that 4944 would stop at the first siding in Tyrone, Oklahoma and they would swap it with the Z train's second unit. The act of one vandal caused two crews to be delayed by over an hour and the line to be tied up during the change. the item handed from the cab at the end was a timetable and siding info booklet.