Without an investigation, speculation runs in all directions. There are so many factors that could cause this accident. We had a one of our trucks hit a 260,000 volt power line and burn it off one time. It blew just about every hydraulic line off the boom. He was carrying a load of pipe up over a hill on a temporary road into a construction site, the so called engineering forgot to take into consideration that heat has a tendency to allow high tension wires to sag. He got the blame until someone figured out what happen besides having to throw away his underwear.
Steve