[John flinches and his chin falls back down on his chest. He stares at Sherlock for a moment, slightly embarrassed that he got caught during his outburst but also clearly relieved to see another person.]

I do it when I'm nervous. Thank you...

[John slips into the jacket, huddling into it like a blanket and bouncing slightly on his heels to warm up.]

So are you real? Because I just said that I... and then you suddenly...

[Gesture, gesture. He pauses, looks down at the jacket he's wearing and the wonderful warmth it provides.]

Okay, that feels real.

[And then, realizing how scattered and incoherent he must sound, he holds up his hands, taking a deep breath.]

I'm sorry. Okay. Can we start over? Because I'm not crazy, I promise. I just, I haven't slept in almost two days and I'm having a really bad day...