It took Sherlock a moment to realize he was supposed to pick up the story from there. He leaned against the back of the couch, much in the same way he tended to do when John was writing a blog entry and he wanted to read over his friend's shoulder.

"Well. I got in the cab, since he'd promised to tell me how he did it. And then he proceeded to drive us all over London--honestly, I've seen blind people take a more direct route..."

"Where did you go?" Susan asked insistently, practically falling into John's lap in her excitement.

"An empty building. A school, in fact." He paused for a moment, his thoughts clearly folding back in on themselves. "One of the quietest places in the city. And then he offered me a choice: two pills. One poisoned, the other not. All I had to do was figure out which was which."