I'm just amazed that they were able to get this sound out of a cello.
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Wow! I'm also amazed, though I have to wonder if 2Cellos double-tracked the recording at some point (about 2/3 through, where the obbligato continues while both players are doing solo things). Quite literally, they shred. (Check out the state of the cello bows by the end.)
I've never even heard of the original song "Thunderstruck" (and I probably wouldn't like it if I did), but this version is fabulous. I would happily listen to nearly anything played on the cello.
Plus, the video is hilarious, especially the floor-solo-part.