In case of death or wounding for example by explosions or great caliber amunition it will be detach extremities.
The blood loss will be get the victim finaly to death. But in subjection of the grade of wounding, he have more or less time for
fight further - like he can - or get a kind of heal by a medic.
The loss of a bodypart should be in combination with crying like here: http://forums.bistudio.com/showthread.php?t=91048