Simp,
I like what you are getting at, I think there are practical limitations to how much "laser focus" you can put in a video and still have a reasonably wide audience to sell it to.
That being said though, I'd love to see a scene in a Gag Factor where a girls head is inverted like you say, and maybe locked in a vise so she can't move or wriggle around.
It would have to be a specially designed vise perhaps made of plexiglass so you can see through to see her skin squished as she gets throatfucked.
Maybe we could do a whole line and call it "Vise City"
Malice