Placing my hand on the top of a plasma ball, a 1980's curiosity, draws the current towards highly conductive material - my wedding ring. The decorative gas plasma light display was designed in 1970 by then MIT student Bill Parker using the principles discovered by Nikola Tesla many years earlier. Tesla called his invention an inert gas discharge tube. Enough science, it makes for a cool photograph. Captured with a Canon 40D, 3.2s, f/8.0, ISO 100, with a Canon 50mm f/2.5 compact macro lens mounted on a tripod.