A violinist was was working on composing a new piece when he noticed that every time he played it, his dog and cat would come into the room, sit quietly, and then fall asleep. Being the observant sort, as well as something of an amateur scientist, he tried this at a friend's house; the same thing happened to her dogs! Immediately, this violinist contacted the director of the local zoo to see just how far his abilities extended.
He'd had some splendid success at the zoo, where he could enter the tiger pit and play the tigers to sleep with the soothing sounds of his violin, but wanted to test out his hypothesis in a more challenging environment: the jungle!
After several hours of hard hiking, the violinist found an ideal clearing, which happened to be right in the middle of an area known for its wildlife. He takes his violin out of its case and begins playing.
Sure enough, before too long, a pack of gorillas (who are, by nature, wary) sauntered by. They were immediately entranced by the music and sat to watch. Several minutes later, the same thing happened to several elephants. Before too long, there were tigers, ocelots, jackals, and a whole variety of birds, all sitting very still and very peacefully while this violinist played.
Suddenly, the violinist was attacked from behind by a leopard, and killed!
The animals were aghast (they're anthropomorphized for the sake of this joke), and asked the leopard "Why, why, why did you kill this man?!"
"The music, you fool! You killed the music! Didn't you hear it?"