Hello.
Were having a animation challange with the topic Physic engine on blender3d.no
This is my entry for the challange and i learnt som new stuff.
Please comment, but its done for my part.
Marsan
Awesome. I never really used Blender’s game engine but that looks really sweet. I wouldn’t know how to do it. 
Very nice.
Really cool. You might want to speed it up a little, as you can see it’s all slow motion, noticeable when block start falling.