My all time worst Catastropic Derailment was a dropped kingpin on the front of an 18-car loaded piggyback train, headed downhill on a 2% grade. Pin dropped, and landed between the ties to make a PRECISE ramp/derail, so that every car behind it, under gravity, rolled into the pin, derailed, and rolled off the roadbed and hit the floor below, a 48" drop. Oh the insanity! More $$$ damage than I've ever had before...... yes, I glue/squeeze/check pins REGULARLY now!!!!