Vlad Bjornson plays with physics

Just stumbled upon this excellent demo by Vlad Bjornson of Second Life's Havok4 physics engine, which is still in beta. On his YouTube posting, Vlad indicated that "Even for a beta test the system seems pretty stable. At one point I had roughly 1,500 physics-enabled boxes in a huge pile. The sim sort of hiccuped for a moment, but then went about it's business like nothing was happening. :)"