Is it his imagination, or does Molly's mouth curve a little against his own when he starts to get the hooks undone? He both wishes he could tell what she was thinking and sort of loves that it's impossible to know.

It turns out that being an excellent violinist is an advantage here. His fingers are strong enough and accustomed enough to precise work that he can get it undone one-handed on the first try.

Sherlock is ridiculously proud of himself for a moment.