What I love about this is, you can tell that John thinks Sherlock is just being Sherlock and dragging it out of him, but he's not, he is genuinely surprised when John says he's his best friend. You can practically see Sherlock's brain grind to a halt.
You know, I really should just rename your board "intellectual fandoms I share with my twit, plus a sprinkling of animals." << side note, look at jawns face in the second gif. He's like "don't laugh don't laugh don't laugh"