Andy Plumer of Lightning Technologies provides a behind the scenes look at their high voltage test facility. The Marx generator is capable of producing over 2 million volts and can create high voltage sparks several meters long. The metal rings at the top of the blue generator prevent the generator from sparking to the ceiling. The tall thin white column is a voltage measuring device.
In the following video there are several tests to a small aircraft model of a Boeing 747. The sparks are so quick that the video camera can barely capture them. Enjoy!!