Tornadoes are rare, but there's nothing more frantic or explosive in nature. Today, the team investigates where that awesome power comes from and what happens when it's unleashed, meeting a nine year old boy in Alabama who was picked up and thrown by a tornado, plus a UK man who survived the worst one ever to hit this country. Leo puts tornado proof materials to the test in a high velocity lab experiment.

Encoded with permission for digital streaming by Infobase on May 23, 2014. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Introduction: Tornadoes: Fierce Earth (Series 1) (1:29) -- Weather Enemy #1 (2:39) -- Storm Chasing (2:03) -- Tornado Alley (3:14) -- Incredible Escape (5:32) -- Tornado Missiles (7:27) -- Freak Event (4:15) -- Survival Guide (1:01) -- Credits: Tornadoes: Fierce Earth (Series 1) (0:29).