John listened to Sherlock, nodding along every now and then to show that he understood what was being said. Under the surface, he was seething, however. Slowly building to a boiling point while he watched Sherlock explain, slowly flexing his hands behind his back.

"You want this to be a training exercise?" John had plenty of experience with training exercises in his life, and if one thing could be said about them, it was that they were utterly unpredictable. After all, in the Army, you had to be prepared at any moment to move and fight back.

"All right. Training. I think I can do that." And to show Sherlock just what he thought of his ridiculous "training" exercises, he reeled back and threw a punch into his face, only waiting around just long enough to make sure that Sherlock didn't hit any furniture on his way down before turning around and finishing his trek to the bedroom.