Mark approaches Callie as she is yelling at someone on the phone. Proving that he is the master at not reading a situation and picking an appropriate time for things, he asks her if she thinks Mere and Derek are going to last. Rather than punching him a la Derek, she gives him a withering stare and reminds him that a semi crashed into a bunch of college kids on the day she decided to pick up an extra shift in the ER. She's got a lot of work for him and begs him to not leave her there, but he just walks off with a grin and a thumbs up, telling her she's handling this. Callie hangs up the phone and heads back to the nurses' station when she's accosted by Arizona, demanding to know what happened the night before. Callie tries to say she's too busy for this but Arizona's got tons on her plate too, and reminds Callie that they went to a four-star restaurant, which was supposed to be romantic, and Callie just ordered a salad, barely talked, and bolted afterward. Arizona asks if she did something and Callie brushes her off by saying she was tired, which is clearly crap and Arizona knows it. But Callie then just gets up and goes to yell at someone, leaving Arizona to wrinkle her brow in confusion.
George is pumping David's chest when Hunt comes back in the room and, after finding out he's been down for 20 minutes, orders George to stop and call it. George doesn't want to but Hunt tells him, quietly but firmly, "You can't save him. Move on to save the people you can." There are going to be more of these kids coming in and Hunt has to order George to get a move on, so a frustrated George turns and orders Lexie to call time of death, clearly not wanting to do it himself.
While Bailey helps Izzie get into the MRI machine, she tries to assure Izzie (and herself) that this could be anything, but Izzie is certain it's a tumor. When Bailey repeats that she doesn't know, Izzie tells her that Denny is standing right behind her and repeats that it's a tumor. Bailey is kind of freaked out as Izzie asks, "Right, Denny?" Denny, all serious in his role as the Grim Reaper says yes and adds, "It's good to see you, Dr. Bailey." Bailey of course can't see him, but when Izzie reports that he says hi, Bailey responds, "Tell Denny Duquette I say 'go home.'" She speaks for a nation -- nay, for the WORLD. Although to be fair, I have to say that now that his appearance has a purpose and is actually being dealt with (in a timely manner and without any ghost sex), it's not so bad. If only they had considered that earlier, before this character was completely ruined for me... Bailey sends Izzie into the machine as Izzie again repeats that it's a tumor, and Somber Denny watches.