Laughter wasn't really part of the response Cal might have expected, but whatever. Surely spending the next two hours watching a movie and not doing anything will be good for Sherlock.

Especially since he can search those shelves all day and he'll never find anything even vaguely "intelligent" or "thought-provoking." (Unless those thoughts are, "I'm sorry, is this supposed to make sense?")

Cal heads for the bathroom, pulling the door shut behind him. As you do.