Sure, Larry David has done a great Bernie Sanders impression, more than once, but there was always one thing missing: what, exactly, is he doing with his hands? It reminds one of something very specific, but what? At first, one wonders if it's an Italian grandmother, but there's not enough range. It even seems at times like he is doing a Larry David impression. But that's not it. The mystery has driven millions mad, but someone has figured it out:

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Ohhhhhhh. That's it.