Saturday Matinee,

And you are supposed to stand when this is performed..  There are reasons for this and probably apocryphal but I would still stand if I were there.

• Upon hearing the "Hallelujah Chorus" movement of "Messiah", allegedly King George II of England was reputedly so overcome with emotion that he spontaneously rose to his feet. When the king stands, everyone stands, so the audience immediately rose also. The tradition of standing for the chorus is still observed today in most live performances of "Messiah".

And there is there is this..