re: #428 Vicious Babushka
I was thinking about all the apocalyptic warnings before Y2K.
My pet one for that sort of thing was the “Great Leap Downward” mentioned in _The Great Dinosaur Robbery_.
(spoiler)
This 1970 novel featured (in passing) the fiendish Communist Chinese plot to have all citizens in China climb atop 8’ step ladders and then jump down at the same moment.
(spoiler)