Previously, on Grey's Anatomy, Callie broke up with George and his fun, fun video games, Meredith broke up with Finn and chose McDreamy, Bailey got raked over the coals at the M&M, and Cristina was secretly helping Burke cover up his shakes.
We open on disgusting surgery footage. Cristina is assisting Burke, and there's blood everywhere. Meredith's VO tells us that being a surgeon requires major commitment. Burke gets a hand cramp and Cristina dives right in, grabbing the small saw he was about to use to cut the patient up. Mere VO: "We have to be willing to pick up that scalpel and make a cut that may, or may not, do more damage than good. It's all about being committed. Because if we're not, we have no business picking up that scalpel in the first place."