In Frankenstein's Laboratory

At the cavernous lab of Lightning Technologies, in Pittsfield, Mass., you first hear a horn's warning blast, then a huge kapow. That's the sound that electrons make when 2.4 million volts send them burning a zigzag path through the air. The bolt proceeds from the hanging double corona ring to a model supplied by one of the lab's clients, in this case an airline that needs to test how lightning affects its planes' ever more pervasive electronic control systems. (If you're a frequent flier, you've surely been zinged by Zeus several times already.)