The papers loved it, of course. The Conservative Party loved it because every time they did something embarrassing they could now refer to it as a "moment of madness" and deflect everybody's attention back to poor Mr Davies' elusive car keys. Everybody loved it, because referring to anything as a "moment of madness" guaranteed a snigger.
Now of course the phrase had been around before. Who can forget The Flower Pot Men's 1969 single? You? Damn you to Hell, you unmusical swine.
However, a quick check tells me that there has been one "moment of madness" in American newspapers in the last month as compared to 119 in Britain. I attribute that discrepancy to Ron Davies. Apparently a "moment of madness" is how we won the rugby last weekend: which fits.
When Ron Davies resigned many thought it the sad popping of career-balloon that was still only half-inflated: I take the contrary view. Any old politician can set up a regional assembly, only the few can change the language.
Lest we forget