I recently saw a person get his arm broken during a BJJ training session. The bone that broke was one of the forearm bones. It sounded like a broom stick snapped..OUCH. The technique that snapped the arm was a loose armbar. The guy whose arm broke was a huge guy and I would think on the street it would have slowed him down. What about a keylock? It seems that would be devastateing on the street.
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