maybe you will love this explode function of the Free SketchyPhysic2 of the Free Google Sketchup ;) http://www.divshare.com/download/3580244-610
(unzip and launch the file explode.htm with your favorite navigator)
Of course it's not an automatic function, you must attach a movement to each pieces, but it's easy ;) http://code.google.com/p/sketchyphysics2/
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Pilou
Is beautiful that please without concept! My Gallery