Hello everyone!
In this tutorial we will see how to make an animation called “Jacob’s Ladder” in Blender 3D 2.6; a Jacob’s Ladder is a high voltage, upward traveling arc, which moves in the gap between two wires diverging away from each other. Maybe you’ve seen this effect in your science class, in a science fair or in a film about a mad scientist… 
Text version (and more tutorials): http://www.cg-village.com/blender-3d-tutorials/46-blender-3d-jacob-s-ladder-electric-
Hope you like it! Bye! 