Until the desirable hand is played.
The pianist manipulates the piano. The drummer manipulates the drum. The trumpeter manipulates the trumpet. The cellist manipulates the cello. The violinist manipulates the violin. The flutist manipulates the flute. The harpist manipulates the harp. The conductor manipulates the harpist and the flutist and the violinist and the cellist and the trumpeter and the drummer and the pianist. The audience manipulates the conductor. And the song manipulates the audience.
All those hands, waving and pressing and clapping, symbiotically, simultaneously manipulating each other, plainly and mainly manifesting manual magnificence and all her manifolds - maniacal magic mandating more and more and more mana until the desirable hand is played...