Why Rorschach entities? Because this model was a big fat fail for me and everyone sees something different. I've heard stuff like cake, caramel, hat, tshirt, chest (close) and "standalone butt". Well, its an armor :-P.
I took this screenshot yesterday. It shows about 6295 dynamic entities (all of them have physics). The slowdown (24fps) is mostly due to my iMac's slow 9400M card though. But that's ok, i don't think there will be a realistic use for 6295 dynamic entities in a game.
Well, maybe if you model a beach and have each rock being a separate entity you can throw around...