legs vibrate up and down, usually one at a time, occasionaly both, subtle rocking.
They arn't very noticible so I do them in public at will, particulary if im sitting down at a table since my legs arn't visible, although the people I'm sitting with can sometimes feel the vibrations in the table from my legs.
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'not only has he hacked his intellect away from his feelings, but he has smashed his feelings and his capacity for judgment into smithereens'.