@hd.physics: You are seeing the physics of a Faraday cage. The exterior is a detailed weave of fine copper mesh, which is a perfect electrical conductor. When the high-voltage discharge hits the cage, it doesn't pass through to the inside; instead, the entire static electric charge instantly redistributes itself across the entire outer surface. This results in a magical effect where the electric field inside the metallic enclosure is zero. This is a life-saving principle of physics used to protect sensitive electronics, defend airplanes from lightning strikes in mid-air, and secure buildings from power surges. The volunteer can touch the interior walls while millions of volts scream across the exterior, proving that it is not the current that is dangerous, but the potential difference which is physically neutralized. #physics #electricity #teslacoil #Science #engineering
