Re: OMG - I didn't know Google had a lightning gun...
You better make sure the connection to earth is robust, and for a mobile electrode there's no substitute to mass for that. May I suggest one of our lovely new ball-and-chain models (now with surge-resistant anti-static shackles)...? We even have an extra-long-chain version to ensure safe ground dissipation as far from you as possible!
Biting the hand that feeds IT
