This isn't the first replica of Thor's hammer (called a Mjolnir) that we've ever seen, but it's definitely one of the best. Using an electromagnet and a fingerprint scanner, engineer Allen Pan created a Mjolnir that only he can lift but dared other people to give it a try.

Pretty much everyone fails except for a clever guy at the end. See the elaborate way it came to life in the video above — it already has more than four million views (!).