the movement starts with timpani rumbling and horns starting up the march theme. then the cellos and double basses start the march in its full form, soon taken over by the violins. just before he is executed there is a short repetition of the "idée fixe" on a solo clarinet, then the axe falls (a loud chord) and his head falls into the basket (one plucked note passed from the violins, through the violas, cellos and then double basses).