Re: When Should You Turn Your Face Away When Being Pinned....?
I was taught how it is possible in ikkyo, nikkyo, and sankyo pins to use uke's shoulder to constrict their carotid artery and cause a lack of blood flow to the brain. However, if uke turns their head in the other direction, the pressure will contribute to the immobilazation without affecting blood flow.
So I would say that once nage starts to put downward pressure it's best to look away so the artery isn't negatively affected. As far as weak spots, I could definitely find them on the front or the back of the head, but in my opinion I'd give the face as a target before I'd give the back of the head.
Break my nose and I'll be even uglier and a bit miffed. Hit me effectively on the occipital process and I might be eating apple sauce through a straw.