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