Here is one of many derailments for the day including all railroads in the worst place... the BNSF "Gauntlet" south of King St Station Seattle.
Some member of TO chimed in and said it was newly installed controlled switch that lined itself different under the moving train.
A "MIR Malfunction" and a mess of derailed flatcars. Clean it up in a jif.
Derailment in Seattle
If you are in a horror movie, you make bad decisions, its what you do.