He had expected Sherlock not to want him to call John, but Greg was surprise at the way he reacted to intensly. He held up his hands. "Alright. I won't, I won't." he tried to reassure the other man. He sat back, looking Sherlock over again. He wasn't sure how he was supposed to handle this Sherlock, instead of the kind of arrogant and annoying one he was used to. It wasn't like he had gotten so used to the insults that he didn't mind them anymore, but he had at some point realized that not everything that sounded like an insult was actually really an insult, coming from Sherlock.
He glanced around the room. "So, erm...." his eyes fell on the case files. "You want to rest some more? Or do you want to have a look at the case? I've been looking it over all night long and I've just got the feeling that I missed something.." he went on, hoping that a good case or some occasion to tease Greg would liven Sherlock up a bit. He really didn't know what else could do the trick.