It's impossible to lift this cube

We brought one of our 4-inch tungsten cubes over to Center of the Universe Brewing in Ashland, Virginia to see if anyone was strong enough to pick it up.

The rules were:
1. You must lift with one hand from the top
2. All 4 corners of the cube must be above the surface at once
3. If you were successful, we bought you a beer.

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[thaddmann]

It's only 40lbs I doubt anyone would struggle lifting unless they were trying to struggle like the dude in the video