A Symphony Joke

I'm not very good at jokes, but here's one I enjoyed:
Beethoven's ninth symphony has been played many times. The local orchestra is playing it. The bass section has no part until the end. So the bass players sneak out the back door, to the local pub for a drink. Or two.
They do it every show, coming back for the finale.
At last nights show, the drinks flowed. So one of the bass players tied the last pages of the conductors sheet music together (so he could drink longer).
The bass players got more drunk. They show up at the last second.
Time comes where the conductor finds problems with his score sewn into a pillow.
The woman next to me says " the conductor looks nervous".
Response:
"Of course he's nervous. It's the last of the ninth, the score is tied, and the basses are loaded