05.03.2011

(Voiceover)

Meredith: Human beings need a lot of things to feel alive.
George: Family...
Cristina:Love...
Izzie: Sex...
Derek: But we only need one thing...
Burke: To actually be alive.
Cristina: We need a beating heart.
Addison: When our heart is threatened...
Alex: We respond in on of two ways.
George: We either run...
Derek:Or...
Izzie: We attack...
Chief: There's a scientific term for this:
Alex: Fight...
Addison: Or flight.
Bailey: It's instinct...
Meredith:We can't control it
Izzie: Or can we?

Grey's Anatomy