The movie of animations produced by Marco Ceccarelli in December 2010 shows an operation of LARM Waist-Trunk integrated in a humanoid robot design in a dynamic simulation of three fundamental movements. The LARM Waist-Trunk has been developed at LARM laboratory of Robotics and Mechatronics in Cassino since the year 2008. The movie deals with problems and solutions that concerns with experimental activity with teaching purposes but design aims.