Hector - yup - I was starting to think of ways you could extend
  it - there are SO many ways. For example, if you are using
  "bending" as the criteria (bent down or bent up), you have
  multiple knuckles. THEN you have your wrist, which has three
  positions while flat (up , middle, down) and three positions
  while rotated sideways (left, middle right) - and two wrists,
  then the elbows... and then you ...get to the shoulderblade
  which has AMAZING flexibility..."

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