hit the bone, my god.

[Kratos]

now that is a roofing nail...I bet the person is just oh so happy to have that going into their body... Gawd I couldnt imagine how that would feel.

They are sleeping when it is done, as part of a larger surgery, they don't even know it happend after two days. It is about the diameter of a roofing nail, and getting it into the bone usually involves a hammer.