The East Wind takes us all in the end.
you can see John’s whole world breaking around him as he see’s the fall happening all over again.
i think part of the reason Sherlock turned away is because thats what he saw to. he realized moments to late that he hit a trauma point in John. him being taken away from John and he’s done it all over again. he can’t bear to look so he turns away
Sherlock does look a little startled there. ”See, I told you I’d take care of- Oh, shit. That’s the devastated face. In retrospect, this might have been a terrible idea.”