Surprise, surprise when Owen turns out to be the new Chief of Trauma at Seattle Grace. Let's just say he didn't quite make the same first impression on the other doctors as he did with Cristina. Owen brings in an anesthetized pig for each doctor, stabs each one in the chest, and says it's up to them and their interns to keep their pig alive. Cristina is in charge of the piglets and tries to save every single one and that is when they first butt heads. Owen tells her she is too much of a perfectionist for trauma because she wants to save every single pig. By the end of the day, Cristina does just that. After, Owen orders her to kill all them now that she's done with them. Let's just say this didn't go over too well.