Quote Originally Posted by Louis VI the Fat
Oh, you mean the musical...

No haven't seen it live. I hear it is rather good though. Is there an English version then?

It is a musical based on the novel by Victor Hugo. It may be more familiar to the English speaking world as the 'Hunchback of the Notre Dame', or 'Quasimodo'.
I had a hunch it might be something like that.

Now the joke.

The phone rings deep in Notre Dame, a clerical figure bustles towards the sound of the ringing, he picks it up.

"Hullo, this is Mrs. Modo here, our Quasi wont be coming into work today, he's got a bad back!".