Plays parts of "Endor - Pump It Up" when you gain stacks of Fancy Footwork on the Council of Blood fight.
Download the following folder and place it in "..\World of Warcraft\_retail_\Interface" (see screenshot)
Download link: https://drive.google.com/drive/folders/12Z42DzN8OltGQ-TDRFQkF7Aujnv71p0l