Toscanini was very nervous at the rehearsals.

Once he directed a symphony in which the harpist had to take one single note once. And the aristocrat managed to falsify!

Toscanini decided to repeat the whole symphony, but when it was time to enter the harp, the musician again stumbled.
The crazy Toscanini left the hall.

There was a concert tonight. The unfortunate harpist takes his place in the orchestra, removes a box from the harp... And what does he see? All strings from the harp are removed. There is only one thing left: necessary.