These guys duck-taped a GoPro Hero camera to the tip of a broadsword and filmed themselves doing some crazy moves. The results will make your head spin. Bonus: Steve Jobs' doppelganger doing his Braveheart bit at the end.
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I expected this to look too blurry to even be understandable, and yet it was fine. I also found it interesting that from the tip of the blade it looked so odd that the person's hand didn't change position at all. Perspective really is everything.