The Roaring Twenties

Why were The Roaring Twenties called The Roaring Twenties?
No, it wasn’t because of the booming economy and everybody celebrating their wealth madly.
It was because the streets were filled with packs of lions.
At first, people hardly noticed them. They were too busy noticing all the automobiles in the streets.
Plus, the lions ate stray dogs and the few not-wealthy people.
It was when the stock market crashed that people noticed the lions.
They threw stockbrokers out of the windows, trying to appease them.
Finally, they put big lion statues outside of public libraries, and that scared them off.