Two flutes playing in unison.
or
If you don't C sharp - you'll B flat!
or
Neptunes!
or
You can tuna piano, but you can't piano a tuna
or
No, but hum a few bars and I'll fake it.
or
Nobody cries when you chop an clarinet into little pieces
or
Everyone is happy when the case is closed
or
Bach in the saddle again.
or
He/She keeps trying to stick their fist up your butt.
or
Pay him for the pizza
or