Quickly, what's the toughest puzzle you've ever had to solve? Also, can you juggle? How about both simultaneously? With a camera filming? GO!

Call it genius or call it a gimmick; either stance doesn't make what David Calvo does with a Rubik's cube (or three) any less impressive. Just take a look:

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Calvo has become pretty notable for exploits like this. In fact, calling him the "cube whisperer" would probably sell his talents short.

But is it the most impressive solving of a Rubik's cube that you've ever seen? There are certainly a few options floating around the web, but Calvo's latest offering has to be listed near the top.

But it couldn't hurt if he also ate fire.

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