STAIR DISMOUNT! http://taat.fi/taat/porrasturvat/
The object of the game is to damage the guy as much as you can (you need to collect insurance money).
You do this by pushing him down a flight of stairs. You can select where, in what direction, and how hard to push him...
A nice display of ragdoll physics (although it's a bit freeform, ie limbs going everywhere) and real-time shadowing.
It's also possible to "exploit" the physics engine... I won't tell you how unless you REALLY want to know.
My top score with exploiting: 504598
My top score without exploiting: 93196
In short, stop just looking at screenshots and thinking "JESUS CHRIST! THAT ENGINE IS PERFECT BECAUSE IT LOOKS LIKE x GAME! MY COLON EXPLODED!"