Office Blocks WIP

My test for the Blender 2.66 bullet physics emulating the beautiful work done here: https://www.youtube.com/watch?v=IV3Wpzgu7Q8 (as shown in the blender 2011 showreel). I wanted to see if i could work out how it was done, and to play around with the new in viewport physics. Rendered in cycles and comped in AE CS4.