It’s the oldest trick in the book: using a surprise announcement to deflect from a negative, persistent story.

And no-one is more familiar recently with a negative, persistent story than Tesla boss Elon Musk who has had his company’s credibility tested lately, having made very bold claims about Model 3 production models, which so far, it has failed miserably to deliver on.

To repeat a number that so many have jumped on recently: only 260 Model 3s were built in a week, when Musk had claimed 5000 would be built in that timeframe.

So, what do you do when the world, not least the stock market on which your company floats, is seriously questioning your ability to deliver?

You reveal not one, but two hugely impressive vehicles. The Tesla Semi lorry alone is impressive. It might not have the looks of a roadster, but it does reportedly achieve 0-60mph in 5sec. 5sec for a lump of that size is hugely impressive.