A director is screen testing Sylvester Stallone and Arnold
Schwarzenegger for a new film about classic composers.

Not
having figured out who to give which part to, he asks Sly who he
would like to be.

Stallone says "I like Mozart. I want to be Mozart"

So the Director says, "Very well, you can be Mozart"

Then he
turns to Arnie and says "Arnie, who would you like to play ?"

And Arnie says "Ah'll be Bach!"