I think my original description would be the normal one. It is normal to distinguish between the narrator per se (the voice actually telling the story), and the focalising through a character. Think of it as a camera. An omniscient narrator can either give you a wide shot or focus through the position of one of the characters -- or, indeed, skip from one to the other.







It is done rather abruptly and inexpertly here, I would say; but that does not mean the technique itself is inherently bad. Thinking of examples is one of my weaknesses, so I won't even try. But it is not a technique I would be surprised to find in a modernist novel, for example.