George O'Malley's very calmly delivered speech to a white supremacist paramedic is all the more awesome for the circumstances that surround it. It's given very quietly, very passively and slightly homicidally as he changes the dressing on the supremacist's wound. It's even more dramatic when you consider the first tenet of medicine is do no harm and the entire plot-line is whether or not you should let a patient's behavior dictate the care you give. George would.
George: Well, Dr. Bailey did save your life today. A black woman saved your life at great personal cost. So maybe next time you're looking at your tattoo, and you're thinking how much better all us white guys are than everyone else, you think about that. Because between you and me, if I had been alone in that O.R.? You'd probably be dead right now. (Leans in) And, uh, since we're sharing belief systems, I believe, if you were dead, the world would be a better place.