                       Summary
  This video shows out details about the motion which are difficult to
  describe in the paper. 

  The first part of the video shows how the robot detects a sudden
  change in ground level without knowing the difference in the elevation.
  For this reflex, the robot contracts its leg till it touches the lower 
  lying ground. This shows also how adaptive the motion controller is, by
  enabling the robot to walk on different type of surfaces.
  
  The second part of the video shows how the humanoid robot steps back very 
  naturally and smartly when it encounters a sudden obstacle as it walks. 

  Finally, the video shows how the robot reacts when it is pushed from the
  back or the front-right, and how it resists the persisting disturbance.
