Thor demonstration video (By courtesy of Tatu Nieminen, HUT, April 2007).
A pretty twisted leader: the effect is exaggerated because it is elongating towards the camera (Picture by courtesy of Arja Hokkanen, HUT, November 2001).
Discharges nearly 3 m long, at a power level of about 4 kW. The strike rail and shield cage prove to be useful (November 2001).
I have never seen Thor discharging to the floor before taking these pictures (November 2001).
Thor discharging to a grounded aluminium stick (November 2001).