the pile up in Dallas had a couple interesting pictures, there are a few aerial shots showing military humvees, after a brief search I couldn't find info on the humvees or any up close pictures of the it's at the tail end of the pile up
a couple days before the pile up in Dallas, there was a story going around about a Koala that caused a pile up on the freeway in Australia which at the time I thought could be comms, a strange story making the rounds everywhere.
anyway what Im getting at is maybe the pile up was planned