We're talking two things here:
(1) Ragdoll Physics - Kill a creature and it becomes limp and drops to the ground. Skyrim does this and the bodies land in awkward positions - very unreal positions. Sometimes a dead wolf will slide down the hill.
(2) Ragdoll Phisics - Kill it and instead of just lying there it behaves like a real rag doll: Floats down stream, falls off the cliff, gets eaten by the bog creature, gets eaten by maggots, flys into the air in two pieces with the fur burnt off.

These are two different things... LOL