After the commercials -- including one for Katherine Heigl's Killers, which I honestly hope does well, because sorry haters, I'm the last person in America who doesn't hate her guts -- Richard has made it to the barricade in front of the hospital. There, he's met by a cop played by Tom Irwin, aka Graham Chase, aka Angela's dad from My So-Called Life! Officer Graham explains that a shooter "took down one of the doctors" and they're not sure if he's still inside. Richard makes to rush inside, but Graham blocks him. No one in, no one out, no exceptions. Richard is frustrated but he ultimately abides by Officer Graham. Cute Ryan Devlin shows up at the barricade with Mandy Moore's pizza, wondering what's going on. Again: Mandy Moore's TOTALLY gonna die, right?
Lexie and Mark lay Alex down on a conference table, but Lexie's certain the gunman is going to come back around and wants to move him. Meanwhile, Mark's tending to the bullet wound, dismayed that there's no exit wound, and Alex is grunting sub-literately about how pissed he is. Mark goes to set up a chest tube, while Alex growls to Lexie, "I'm gonna kick that guy's ass when I see him!"
Peds. It's pretty much chaos, and as Two reports (I'm fairly sure this is the intern Cristina used to call Two, yes?) on the all the sick and/or crying kids, they realize they're way understaffed. Callie suggests putting most of them in the playroom, where they can keep an eye on all of them. Two objects, but Arizona thinks it's a great idea. She thanks Callie, who huffs off all "Whatever..."
Meredith and Cristina saunter up a staircase like there's not a gunman on the loose (far as they're concerned, there's not), and Cristina talks out the Owen thing. Mere cheers her up by telling her she's going to be a godmother. Cristina's effervescent about that one. She needs clarification as to what that means -- like, God stuff? Mere says it means Cristina takes care of the kid if she and Derek die. "I gotta admit," Cristina smirks, "I kinda hope you and Derek die, just a little bit." As both women sidestep a lightning bolt, Derek bursts into the corridor. He's all "Uh lockdown! WTF?" Only more gravely concerned. They're still flippant until he moves them into a closet and tells them there's a shooter on the loose. He orders them to stay put.