One notable example of this is when a soldier gets killed by an explosion. If the explosion is from in front his arms will flail back as if they weigh little more than twigs. It looks unrealistic as if there is no resistance in his arm coming from his arm socket.
In the case of explosions from other angles it isn't too noticeable (the lack of tendon resistance) except that his arms' still flail weightlessly.
Same thing also applies to necks or any other joint on the soldier's body. There just isn't enough resistance causing weird flailing effects on occasion.
hope this issue can be fixed as the current rag doll effects can kill realism for some people.