It's far less dramatic in Derek's OR where he and Lexie are fixing Kerry right up. Derek compliments Lexie on catching the problem, and Lex thanks him for listening and not being afraid of her. In surgery, working through a microscope, Derek has to stay calmer and more contained than he's been lately (a welcome relief) and when Lexie complains about Mark's hovering Derek tells her that he does it because he's afraid for her, not of her. He realizes that Marks' hovering equals Mere's leaving him to get peed on in jail; it all comes from the same place. The music is dreamy so we know they are now all absorbing this Very Important Lesson.
Mere runs in to the scrub room and past April, who protests that she's not allowed and then meekly adds that they are friends now so she'll shut up. Mere grabs a mask and calls, "Good girl!" as she runs in and, ignoring Teddy's protests that she can't be there, rushes to her best friend. She immediately gets down on the floor so that she and Cristina are face to face. Cristina is an absolute mess, shaking, barely able to get out words as she tells Mere she can't be there. Mere tells her that's okay, let's go, but Cristina finally croaks out that she's scared and she can't feel anything or move her legs. She begins to panic but Meredith grabs her hand and pinches her palm, asking if Cristina can feel that. Slowly, she nods a shaky yes, and Meredith tells her that they'll just go when she's ready. She gives Cristina a smile, while Cristina just shakes and tears roll down her face and on to the floor.