Dr. Hank Hurrass visited Ridgeline Academy to teach summer school students about the Hellcat coil that just became a part of the Guinness Book of World Records. We learned that it took him a year to build the Hellcat coil, and he didn't know whether it would even work. The coil is not a new invention, in fact, it has been around for over a century, one of the many novel creations of inventor and electrical engineer Nikola Tesla, who also developed radio and radar waves, fluorescent lights and the AC distribution system used in our homes today.