BBC NEWS | Technology | Messing and mashing in Texas:
The noise was horrific. Two tall electrical coils charged up to thousands of volts gave off lurid pink sparks that arced and danced to the tunes of popular classical music pieces.
It was a fearsome synthesiser made of Tesla coils straight out of a school physics lab.
It is the kind of madness that typifies the South by Southwest (SXSW) festival, held in the Texan capital, Austin.