Cristina is thrilled when Teddy assigns her her first solo cardio surgery, a heart-valve replacement. "I am a living, breathing cardio-thoracic surgeon as of now," she boasts. The patient throws Cristina for a loop, however, when she decides against the mechanical valve for one from a pig, which is an entirely different surgery. Cristina preps for the new surgery, and then the patient decides she wants a cow valve instead. Cristina presents her with both valves and forces her to choose. But there's a problem during surgery when the patient starts to bleed out. Cristina is faced with two choices of how to solve the problem and can't decide which to do. We get more than a little alarmed when Teddy refuses to step in, and also dissuades Owen, who's just entered the O.R., to take over. "She's not going to let her die. She's going to save this patient," Teddy insists, and we're relieved to see that she's right. Cristina makes the right call and the patient is fine, but Owen asks Teddy, "So nothing else was going on in that room?"