Space peanut!
From comments at the article:
PS - there’s a superb, if unwitting, demonstration of how this ‘anomaly’ comes about in this image : Note how the *actual* light is blown out, but the reflection of it (caused by an internal lens flare) is symmetrically placed in the opposite diagonal location in the image - just as a lot of lens flares do.. And if you shoot through a curved car side window, or get that reflection off an angled windscreen, then you can get it happening at pretty much any angle.. Busted”
Wait......WHA?!