Sometimes the most intense fights feature absolutely no physicality or words at all. Somebody in New York City shot video of two guys having a crazy "bird-flipping" exchange.

There's no pushing, no punches, nothing said, just controlled fury that continues for 25 seconds, and features about 13 different "flip-offs."

Having very little knowledge of ASL, I can only assume that most heated arguments look like this in sign language.

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