"BNSF had 30-plus cars run away from Rennick Yard Denver into 31st Street. Salt Mine job with two units, BNSF 2505 and GP28M 1532, were hit by cars doing about 40 mph. BNSF 2505's frame is all that remained after Coors tank cars slammed into switch job."
The 'silver bullet' lived up to it's reputation. I hope the engineer was in the other engine.