Spoiler alert. Don't watch this until you've seen the episode called Engineering Mind Challenge - http://www.engineering.com/Videos/Thisweekinengineering/VideoId/2843/TWIE-91-Engineering-Brain-Challenge-.aspx. In this episode Dan and Vince show the geometry and physics behind the epic YouTube fail of Stuntman89's attempt to put his head between the blades of a ceiling fan and pull it out without getting whacked. |
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