Sherlock would have normally ignored someone puttering around, deeply involved in their work--he didn't like to be distracted himself unless he felt like talking and showing off everything he'd deduced.

Right now, however, he was hopelessly bored and in search of any entertainment whatsoever.

"Tell me, doctor, is your bedside manner always this terrible? I'm a patient and you haven't even checked up on me. I could be lying here dying. Admittedly, I'd be dying of boredom..."