public void setRagdollMode() {
        verifyReadyForDynamicMode("set ragdoll mode");

        TorsoLink torsoLink = getTorsoLink();
        Vector3f acceleration = gravity(null);
        torsoLink.setDynamic(acceleration);
        for (BoneLink boneLink : getBoneLinks()) {
            boneLink.setDynamic(acceleration);
        }
    }
Immediately put this control into ragdoll mode.
<p>
Allowed only when the control IS added to a spatial and all links are
"ready".
jme3-jbullet/src/main/java/com/jme3/bullet/animation/DynamicAnimControl.java