A ragdoll made of the new PhysX collision box models.
3D Rad v7.10
After installation, in 3D Rad, you can access the addon by pressing Ctrl+D.
Link anything that you want to collide with and the g-force to all the rigidbody body parts, and it is set.
If you want it to stand up, I'd suggest making a joint hold the head up and break when it is hit/dropped.