I think the interesting difference is between how he reacted differently to Sheldon's uncle passing and Jess getting killed. He actually did hug Sheldon and offer comfort and he didn't even know Uncle Frank. But with Flack and Jess, the first thing he did was punch the wall, which didn't seem self-indulgent to me. It seemed more like frustration at a death that shouldn't have happened and a knowledge that he knew Flack wouldn't want a public hug or a scene in the hospital with Danny going all...."danny" on him. So he chose to do something physical but not personal. Totally unlike Danny, right? As for the opening scene, they didn't show Adam, Lindsay or Sid. But then none of those three were in the line of fire during the episode. Adam was under a car, but no one was shooting at him. I think it may have been a way to hype the danger and action of the episode.