The bassoon player becomes enraged and smashes him over the head with his specially crafted bassoon that smashes into pieces as the oboe player fakes being knocked out.
Now the violinist is pissed, takes his violin and uses it like a bow, launching the violin bow (ironically) at the bassoon player,
who ducks the shot, but the flute player turns around and has a fake bow imbedded in his back.
Pandemonium ensues and some of the performers fight while the others create the music background for the pandemonium ensuing. (a-la looney toons).
At the end of the performance, the performers all stand up and take a bow. No, not a bow to the back from a bow being shot by a violin being used as a bow.
Maybe it's "Orchestral WWF", whatever it is they do that fake fighting thing.