Introduction: Slow Motion Tesla Coil - ArcAttack
High Speed video at 300FPS of the Tesla Coils played by ArcAttack @ Maker Faire 2011
The meandering path of the sparks from the tesla coil are more visible in this slow motion video than when viewed with the naked eye. They form what appears to be loops from a 2D perspective. These "loops" are probably spirals when viewed from the side, and the electricity never actually intersects.
See more cool high speed videos here: http://danielbauen.com/make/index.php/high-speed-videos/