Are we talking about the unaired pilot or the official Study in pink episode? Because Sherlock wasn't drugged in the official one.

Before, we see the killer we find that he made a mistake. That made him feel human. When Sherlock was with the villain, everything about the villain was so in your face so mad evil genius that some people who watched the episode have related that it kind of snapped them out of the show's groundedness. But I loved it. He felt like the real deal. Like a dragon towering over a knight. In this case, Benedict's not the dragon. Hehe.

Anyway, the way he spoke. The frustration and anger he has towards people because they don't think. He could have lied about anything else but to him that doesn't matter because he cared only about the game. The game is important to him because it reflects his worth and moves away from his image of a funny little man. The fact that he could lose was the thrill of it all. That he was clever to outlive others using his head is euphoric. Kind of ironic because his head is the reason he might drop dead any moment.

He said "What's the point of being clever if you can't prove it" not just to Sherlock but to himself as well. "Clever enough to bet your life." He's dying anyway, why not bet his life on who's superior. This is good enough not to cheat. In this way, Sherlock and him are of the same feather. The cabbie at this point has his pill out of the bottle. Ready to take it.

"You're not the only one to enjoy a good murder. There's others like you except you're just a man. And they're so much more." Of course there is a real possibility that he's just a really good liar. He's not really a genius at all and he was guided on how to manipulate Sherlock into a deadly game. But then that's just denying that there are others out there that could take over the mantle of the Napoleon of Crime. In fact, there are other geniuses out there, other than Moriarty or Sherlock, with a spectrum of motives and ambitions. The cab