This scene show the character "Cepot" dancing Jaipongan. At first he can't start the dance as no Kendang sound...then the music was stop without he can dance.
Unless you understand Sundanese or Degung, I think its dificult to understand the humor sense of this scene...i m sorry for that
wayang Golek is a Sundanese traditional puppet performance. This clip show a typical starting of an Wayang Golek performance. This clip taken from VCD, and i just add some english information.