The last two characters are playing rough music on bladder fiddles.

The bladder fiddle (also known as bumbass or poispil) is a folk instrument used throughout Europe.

In Venezuela, the bladder fiddle is known as "marimba, tarimba, guarumba, guasdua, and carangano".

The boom-ba is a type of bladder fiddle, known throughout the Pennsylvania Dutch culture of eastern Pennsylvania, United States.

It is known under different names; in Germany it was called the bumbass, in France the basse de Flandre, and in England a drone, "drone and string" or bladder fiddle.

Theviolí de bufa is a primitive Catalan instrument, a type of bladder fiddle, made of a pig's bladder connected to a bowed stick of cane, over which pass one to three strings, that are "bowed" with another knobby stick, as though playing the double bass.