Meredith: (opening voiceover) I had this badass professor in med school. She seemed invincible. Then one day, she needed her gallbladder out. And the surgery killed her. Her platelets stopped clotting. She bled out on the table. Everything that could've gone wrong, did go wrong. Surgeons have a name for it. We call it a perfect storm. Funny. Never thought it would happen to me.