Visibly open skulls

[Bologna Prime]

So the idea is that when a roboticist is halfway through cutting a brain out, the victim/patient's head becomes open and you can see the brain. This would look like a borg with an open head compartment, but what the hell is an open head going to actually do? I could say that maybe you could yank someone's brain out but that would be boring. My idea is that when somebody has an open skull, roboticists have the ability to weld a butt onto the patient's head, replacing the removed skull with a butt that can only be cut off with surgery. Because the butt is now part of your head, you could still wear hats in case for some reason you don't want people to see your head buttocks but that would be a horrible thing to do.