[Holmes is standing in front of a glass containing a group of flies, strumming chords on his violin as he observes them]

Watson, what started merely as an experiment has led me to the brink of a remarkable discovery.

You do realize that what you're drinking is meant for eye surgery?

If I play a chromatic scale, there's no measurable response. Now, and this is remarkable, I switch to atonal clusters …

[The flies start flying in neat circles]

Voilà! They fly in synchronized, counterclockwise, concentric circles, as though a regimented flock. Watson, this is extraordinary. I, using musical theory, have created order … out of chaos.

How did you lure them in?

Excellent question. Individually. I've been at it for six hours.

And what happens if I do this?

[He takes the lid off the glass and taps the glass with his cane, letting all the insects fly out]

… Right.

Get yourself cleaned up. You are Blackwood's last request.