I happened to be in the area shortly after todays MAX derailment. (So was our own Jason McHuff, as coincidence would have it).
As derailments go, it was both not serious and very serious. Not serious, thankfully, because there were no injuries or collisions, but very serious in that at least three trucks (wheel assemblies) of the train had come of the track and had gotten pretty well embedded into the brick and concrete.
Here’s some high-definition footage I took. An interesting bit of overheard conversation: Note that the foreman is calling an emergency meeting of the various crew departments, and that he states that he has no idea how to get the train back on the tracks but will do whatever the other crew heads tell him needs to be done.