From the slide it appears that the train might have derailed and went in to the signal bridge causing this to happen. I do not recall this incident but maybe SHL will, he has an excellent memory.
charlie6017 wrote:Definitely looks derailed......from rear of second car and onward. If you zoom-in (press CTRL and the + sign),Oh yes. No question that it's derailed. When I first looked at it though for some reason it popped into my mind that the signal bridge had collapsed onto the train and caused the derailment.
you'll see in more detail.