This picture is of Spreader number 8 derailed just north of Denali Park. The front truck is really difficult to access on a spreader, so of course that is the one that is off the track! Fortunately the spreader operator caught it quickly and radioed for a stop. And dumping and spreading ballast is done at slow speeds, so with some wood blocking they were fairly quickly able to coax the offending truck back on the track.
 

Photo courtesy of Jason Kuehn