It’s ArcAttack! I love these guys (saw them at DragonCon 08, and wow, that was an electrifying experience to say the least). They use Tesla coils to create music, ‘nuf said.
Here is a fantastic video by ArcAttack of a Tesla Coil playing the “Imperial March” Star Wars song — while zapping one of the ArcAttack guys (and no that’s not chain mail he’s in, its a wearable Faraday cage which is pretty fantastic). There is a short lead in time showing some preparation, but the action starts soon enough.
For more on ArcAttack, visit their website! Evil geniuses… I mean… artistic geniuses like this need your support!