If you're after a quick little rigidbody sim, I'd suggest giving this a try. Simple, quick, fairly consistent and reliable (so far!).
Just make sure you keep organised and clean the scene up straight after baking, crashes do happen...
Details:
http://bulletphysics.org/mediawiki-1.5.8/index.php/Maya_Dynamica_Plugin
Downloads:
https://code.google.com/p/dynamica/downloads/list
Siggraph 2011 vid:
http://mbakr.squarespace.com/blog/siggraph-2011-destruction-dynamics-for-film-and-game-product.html
