CATIA - 3D Excellent Simulation Software

I know CATIA a little bit and i can say that it is one of the best entire package software available in the market. Please see the attached video. It is 3D simulation i have created when i was learning CATIA, it shows the excellent manner in which CATIA uses the constraints and runs the simulation to provide very detailed functionality of assembly. Enjoy the video:

http://www.youtube.com/watch?v=f_HaRxb9swk...as it is more than 100 MB please find it on youtube.com

Thanks