I wish I could say that

John Watson: Don't do that. 
Sherlock Holmes: Do what? 
John Watson: The look. 
Sherlock Holmes: Look? 
John Watson: You are doing the look again. 
Sherlock Holmes: I can't see it, can I? 
[looks into the mirror
Sherlock Holmes: It's my face. 
John Watson: Yes and it's doing a thing. You're doing a 'We both know what's going on'-face. 
Sherlock Holmes: We do. 
John Watson: No, I don't, which is why I find the face so annoying. 

~Sherlock: The Reichenbach Fall (2012)