The headframe is the biggest deal of the whole procedure and it's not a big deal. I'm not sure why they do it this way, perhaps it has to do with the type of anesthesia, but it is just like a pit stop at a car race. They'll give you a light anesthesia, numb the sites, and then will have multiple people put that thing on in about five minutes. I was at UVA so I had about six people, a couple were residents. I was talking to them the whole time, probably not enough anesthesia. One of my pins did land next to a blood vessel, so the local wore off eventually and that was annoying, kind of like having a bad fitting hat or helmet. But it is reassuring that they use the frame to bolt you into the GK machine so that the aiming is precise. I think they actually use the frame to help line to radiation up the way they want it with the tumor. The frame is nothing to worry about.