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[–] prairie 0 points 1 point (+1|-0) ago 

I take it there's water (warm?) running through the handle, through the frame, then providing a slick surface below for the chunk to slide out?

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[–] Tb0n3 0 points 1 point (+1|-0) ago 

As good an idea as using hot water to clear ice off your windshield.

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[–] 14715068? ago 

Using boiling water works even better. You should try it some time.

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[–] blumen4alles 0 points 1 point (+1|-0) ago 

I doubt it, that adds quite a bit of complication, but an interesting idea nonetheless. To me it looks like a purely mechanical device, no heat being used. It relies on the thin sides slicing through (which as others said wouldn't work on packed snow) and there might be a coating on the sheet of plastic to make it slick.