Falling Pendulum

This time, the pendulum is free to fall out. Look what happens! Once again, the gravity force is the only cause of the movement. Open the .iam with Inventor 2014, then enter the Environment/Dynamic Simulation and hit Play and watch the dynamics. Change the angle view to see another reality. Another animation - without any obstacle - is here: http://youtu.be/-Ma7XWQUz8Y