Sarcasm is an adjusted stress reaction.

I loved this episode so hard. I cried (and I'm not a big crier) through the "see you later" farewell scene. I just thought it was fantastic in the messy way of Moffat's finales, all of which I've loved dearly. But this had so much effing heart and I'm excited about the set-up for the anniversary episode. V. EXCITED JOHN HURT YAYS!