"How was tennis?"
"...Fine."
"...Sherlock?"
"Mm?"
"Come here."
"Why?"
"Why are you limping?"
"I'm not."
"You've been out for five hours, by the way."
"Long session."
"Oh, come on. What have you done to your bloody leg?"
"I haven't done anything to my leg! You're just jealous that mine works better than yours does."
"Don't start that now, Sherlock, I'm warning you."
"I'll start whatever I want to."
"Then I'll start asking about your leg."
"John!"
"Did you actually think I wouldn't notice the cast?"
"You didn't notice when I broke three of my ribs."
"...When did that happen?"
"Exactly."