Actually it doesn't move anywhere. You're thinking of Doom Eternal where you can crush a head into a neck/spine.
So let's try this another way: put your forehead against a wall. Now moving nothing but your head, try to look down.
Doesn't work, does it. Hmmm? Let me show you why it doesn't work.
I mean you can see right there in the picture, when he moves his head forward, his eyes/vision move down. This is elementary biology.
Maybe you should let everyone in the aviation industry know that after 100+ years of powered flight, they've been holding it wrong all this time. Heh.