How #escapement Works on a #clock or #watch #tick #tock tick and
  the circle moves. Tock and it catches a triangle that stops it.
  Start stop
  [vine id = "hd1txIwdAHF"]
  How #escapement Works on a #clock or #watch #tick #tock tick and
  the circle moves. Tock and it catches a triangle that stops it.
  Start stop