He's reaching in his pocket for... something, he's not sure -- a flask, a cigarette, something to rein in the feelings he is not used to having. (Blunted affect is either a side effect or a symptom, he's not actually sure anymore. The lines blur.) But he looks up when he hears a voice, surprised, as if he's not expecting to be addressed.

Pause. "Hello."

He should make his face look -- something. 'Friendly' is more feasible than 'fine' or even 'okay,' but that's a difficult distinction to make. He makes an effort to smile. It's not a very good one, but there's effort in it anyway.