But not really. While she stood up for herself in front of Dr. Bailey, Cristina Yang gave Lexie Grey a nice compliment at the end, telling her what she did for Nick was brave. Then Cristina went and danced away the pain... we love her.
There is no O.R. open and the doctors weren't prepared for a series of events that took Nick's life in the end. Cristina tells Lexie this just happens sometimes but they do more good than harm overall.