A brief 101 overview of dynamics in Cinema 4D from The Pixel Lab, including some useful MoDynamics tips, in this tutorial on creating an explosion complete with a matrix like time warp effect.
7-C4D-Dynamics 101 and the Matrix Effect from The Pixel Lab on Vimeo.
Mahagon
Thank you for the tutorial!
An alternative (maybe more controllable) way for the slow down Matrix effect:
Using Time Tracks:
http://www.kxcad.net/cinema_4d/help/US/html/10834.html