I have never thrown anything at a band on stage, but this would have been a good time to start. And I'm not talking beer or frisbees, I'm talking batteries or billiard balls. Maybe even a spear. Imagine a big-ass Shaka Zulu spear flying in from offscreen and impaling the "singer" right through the neck. Then someone yells, "Shut the FUCK up!"
Then flaming arrows take out the rest of the band.