Haha, people flying in the air and SMASHING into street lamps ! Bing !
Seriously, I liked very much the system of "ragdolls" in GTA IV. You know, the fact that a dead or K.O. body is all loose, I found it much realistic. Plus, if you add the fact that hurt people could try to escape with their last forces, that solves the problem of "who takes them to the infirmary ?", etc...