How To Blow Up A House With Popcorn:
A Look Back At ‘Real Genius,’ 30 Years Later
http://uproxx.com/movies/2015/12/real-genius-30-anniversary-popcorn-scene/
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Wait a minute... who am I here?
Outside of the fact there's not enough popcorn to fill the house (once popped) and the foil covering would reflect the laser, Mythbusters showed that expanding popcorn can't generate enforce to do much damage.
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