Yes. It doesn't have to be as hard as other locations to produce a knockout. It just takes some knowledge and a little practice.
::It just takes some knowledge and a little practice.::
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Does this punch have a name? I would like to be able to look it up to learn it. Look, I am an old woman who has no desire to become engaged in bar fights, but it would be nice to have something like that to fall back on in an emergency.