Yes my 1.5mm thick scalp should have been 3mm to 8mm thick (i blame bad wording in wiki).
Anyhow pulling a hair out of our scalp slowly would i reckon be much more painful than pulling it out at 500 fps.
I will have a re-read of Mortal Error re Donahue's angles etc.
The average adult scalp is between 5.5 mm and 5.8 mm deep/thick. I said 5.5 mm to be conservative and to give every benefit of doubt.
It is just not reasonable to argue that a fragment that tore through four of the five layers of the scalp and penetrated into the periosteum would not have caused a sharp stabbing pain. It is even more unreasonable to claim that a fragment that tore through every layer of the scalp and embedded itself in the outer table would not have caused an even sharper stabbing pain.
Yes, do read Donahue's research on the angles involved with the rear head shot. One of the things that led Donahue to look for another shooter for the rear head shot was his realization that no bullet fired from the alleged Oswald window could have hit near the EOP and then created the exit wound claimed by the autopsy doctors. He realized, as the WC acknowledged in one of their diagrams, that JFK's head would have had to be titled about 60 degrees forward to enable a bullet fired from the sixth-floor window to have created the entry and exit wounds described by the autopsy doctors.
Hmmmmm...... what if the 6.3 by 2.5 fragment (if true), happened some time between 22nov1963 & the previous xrays (taken in i think 1960)?
Surely you know that this is a very far-fetched suggestion. There is no record of JFK being anywhere near gunfire in a paved area before the day of the assassination. JFK did not enjoy guns and hunting. His only known hunting activity was reportedly when LBJ took him hunting on his ranch about two weeks after the 1960 election, and nothing unusual was reported as occurring during the outing--and, needless to say, there was no pavement in the woods where they were hunting.
You keep saying "if true" about the 6.3 x 2.5 mm fragment. Why? Do you think that Dr. Mantik fabricated his OD measurements of the fragment? Do you think that Dr. Chesser fabricated his OD measurements of the fragment? Dr. Mantik discovered the fragment only after viewing the 6.5 mm object under high magnification, and he then did OD measurements on it to confirm his visual detection.
Do you think that Dr. Fitzpatrick was somehow mistaken when he said, after spending many hours examining the skull x-rays over a two-day period, that there is a small fragment in the back of the head on the lateral x-rays that is within the 6.5 mm object's area when viewed from the AP angle? Do you think that all the HSCA FPP experts were mistaken when they said they saw a small back-of-head fragment on the lateral x-rays that vertically aligned with the 6.5 mm object seen on the AP x-ray? Do you understand that even Dr. Sturdivan has acknowledged that there's a small bullet fragment in that location on the lateral x-rays but that it cannot be the lateral view of the 6.5 mm object?
There's no "if true" about it.
Researchers have long puzzled over Sibert and O'Neill's reference to a bullet fragment "at the rear of the skull" in their 11/26/63 report on the autopsy (p. 4). They said it was the "next largest fragment" and that it appeared to be "at the rear of the skull at the juncture of the skull bone." The 6.3 x 2.5 mm fragment is close to the lamda, and the lamda is the meeting point of the lambdoid suture and sagittal suture at the top of the occiput; it can certainly be described as the juncture of the skull bone in the back of the head.
However, the autopsy report says that the second-largest fragment was 3 x 1 mm, and that fragment was nowhere near the back of the head but was very close to the right orbit, as we can see on the skull x-rays.
Some researchers, myself included, rightly suspect that Sibert and O'Neill's brief entry about a rear-head fragment was based on the autopsy doctors talking about the 6.3 x 2.5 mm fragment, and that the autopsy doctors chose to suppress the fragment's existence because of the severe problems it posed for their scenario of the shooting. Being at/near the rear "juncture of the skull bone," the fragment was far too high to be associated with the EOP entry site, and there was no other entry wound that could account for its presence at/near the lamda.
So, they opted to suppress its existence. As they did with the high fragment trail, they did not mention the back-of-head fragment in the autopsy report; however, they did not realize that Sibert and O'Neill mentioned the fragment in their 11/26/23 report. This could be one of the reasons that Sibert and O'Neill's report was not included in the WC volumes and was suppressed for years.
The 6.3 x 2.5 mm fragment could be described as the second-largest fragment on the x-rays, second only to the 7 x 2 mm fragment near the right orbit. Indeed, without the benefit of high magnification, the 6.3 x 2.5 mm fragment may have appeared to the autopsy doctors to be somewhat smaller, especially given its appearance on the lateral skull x-rays.