Anyone who has seen 'Avengers: Age of Ultron' will have seen Tony Stark theorizing as to whether Thor's hammer (Mjolnir) is made only to recognize his fingerprints. Thor had already explained that only the worthy can lift the Hammer, you see. YouTuber 'Sufficiently Advanced' decided to play around with this concept and managed to create his own working version of the hammer using electromagnets which can only be switched off with his own thumbprint. Take a look at this awesome video of people at Venice Beach trying their best to lift the hammer which of course stuck fast to the metal surfaces it was placed upon until the right thumbprint came along!
Website: YouTube
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