Been a long time since I have heard the word 'crummie'. I was born in '56, and still recall some of the crummies back then. Most that I saw were short versions of a school bus, with their tongue dragging the ground.
I also remember my dad, who used to work for Weyerhaeuser Twin Harbors, working with some REAL blowdown, from the infamous Columbus Day storm, from about 1962 or thereabouts. That's about all we heard at the dinner table for a long time. It wasn't just blowdown. It was also a twisted, tangled mess. They had a few more injuries than usual, but they pretty much had their guard up, and did pretty well. Even so, I believe the aftermath of Mount St. Helens had to be far worse.