He said that he would acquire no knowledge which did not bear upon his object. Therefore all the knowledge which he possessed was such as would be useful to him. I enumerated in my own mind all the various points upon which he had shown me that he was exceptionally well informed. I even took a pencil and jotted them down. I could not help smiling at the document when I had completed it. It ran this way:
When Moriarty shakes Sherlock’s hand at the end, Sherlock cocks his head in a slightly puzzled manner, looking at him in confusion… at least, that’s what you realise when you notice that Moriarty used his right hand to shake hands with him, despite being left-handed (as we see earlier in the episode, with the teacup). Moriarty left his main hand free to grab his gun and kill himself, and Sherlock has just enough time to notice that.
Sherlock is being strangled at Soo Lin’s flat; pretty badly too. It looks like he passes out for a few moments and can barely talk afterwards. The attacker simply stops for some reason. Why? Because John, sarcastically bitching outside, has just said that he is Sherlock Holmes. Good luck for Sherlock that John is a Grand Master of Snark and the Black Lotus is entirely populated with total morons. It saved his life.
You know… I actually didn’t put that together. Go plot-insight, four for you!
THIS WAS THE MOMENT THAT I REALIZED THAT JOHN WAS THE MASTER OF SNARK…. and Sherlock should thank him for it!