Magic Smoke Is A Tongue-In-Cheek Term For Smoke Produced By?
  1. Recreational Mushroom Burning
  2. Burning Evidence
  3. Damaged Electronics
  4. Stage Show Magicians

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via How-To Geek http://www.howtogeek.com/trivia/magic-smoke-is-a-tongue-in-cheek-term-for-smoke-produced-by/