Bit silly as a publicity stunt, I'd think. But presumably that photo was taken after her car had been recovered, because the incident report describes it being piled nose-first into undergrowth not evident here. That suggests the accident started with a loss of control - which, at night on an unlit road in a century-old deathtrap like that one, wouldn't just be easy to do but likely quite hard to avoid.
I've been in enough car wrecks, and those in modern cars, for it to strike me as arrantly foolish no one ever seems to consider the possibility she got her bell rung. Even an airbag will do that sometimes - I've had two of those go off in my face, and one of them did exactly that; it's more than anything else like taking a hard, well-aimed punch, and even if it does save you ending up with much worse, you still are liable not to be thinking right for a while after. And that's with a hundred years of safety engineering! Christie's car wouldn't even have had seatbelts or safety glass - it's got to be at least half a miracle she made it out alive.