Your mention about shaking your head is very interesting. How did you come up with that? Are you aware of Peter Levine's or David Berceli's work on shaking/trem

Your mention about shaking your head is very interesting. How did you come up with that? Are you aware of Peter Levine's or David Berceli's work on shaking/trembling as a natural stress-releasing mammallian instinct that people are usually repressing?