Watson: (after Sherlock's fake attack she falls over and realizes the attacker is Sherlock) What is your damage?
Holmes: Look, given that you were held at gunpoint in this very room little over a week ago, I thought, perhaps, a test of your ability to defend yourself was in order. It was. You have much to learn about the art of self-preservation.
Watson: Okay, if you ever do that again, I swear--
Holmes: You'll what? Fall over again?