At the 2011 Bay Area Maker Faire, Adam Savage of Mythbusters teamed up with Tesla coil musical troupe ArcAttack for some freestyle cage dancing. This is definitely one of those "Don't Try This At Home" moments.

Here's the show from another angle and a description of how ArcAttack's live performance works:

Two custom engineered hand built Tesla Coils throw out electrical arcs up to twelve feet long, each one acting as an instrument with a sound reminiscent of the early days of the synthesizer. A robotic drum set accompanies the spectacle, it's high power LED's flashing bright colors with the stroke of each mechanically actuated stick, while ArcAttack's six members churn out rhythmic instrumental melodies.

[Via Metafilter]