Meredith Grey (narration): There are some disasters you just don't see coming, no matter how carefully you plan. A little surprise that changes everything. In surgery, we call it a complication. In life, it's a catastrophe. In surgery, we call it a complication, a disruption, a glitch, a nasty surprise. It calls for extreme measures. You have to react quickly, try to catch up, because it came out of nowhere. And it can take everything away.