Ragdolls are used to animate death and accidents. See how to create it in Blender with armature and rigid body physics.
Download final file from https://drive.google.com/file/d/0B101nEQ77ftbVWhsVkhMR3Z3VnM/view?usp=sharing
Download file where ragdoll is combined with normal animation https://drive.google.com/open?id=0B101nEQ77ftbTld3UmpwZXozcGM
00:00 intro
00:25 adding hitbox (rigid body)
03:20 duplicating boxes and making a mirror
05:00 applying scale
05:30 starting with rigid body constraints
06:15 adjusting location to bones
07:25 applying visual transforms (object constraints)
08:40 connecting hitboxes by rigid body constraints
09:45 solver iterations
10:40 setting rotation for constraints
15:30 bug in generic constraint
17:30 connecting armature with hitboxes
18:50 bone constraint - Child of
19:55 testing ragdoll
20:50 grouping objects