I've seen people use Blender to do animations like that where two blocks collided but didn't pass through each other.
If you look up how to do video intro animations, you might be able to get more information on it. I know I said video, you can use Blender as a non-linear video editor. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
