Gawande’s friend tells him about a patient that came in with a stab wound. The doctors treat it like a normal wound, but it actually came from a bayonet, causing deep damage. No one had remembered to ask what the type of weapon was. He then asks Gawande to diagnose a patient who goes asystole during surgery. Gawande is unable to diagnose the problem correctly, which winds up being a potassium overdose, which is one of the most common causes of asystole.