posNoZ.x = target.transform.position.x;

if (target)
{
    float posY = transform.position.y;
    float targetDirectionY = (target.transform.position.y - posY);
    float interpVelocityY = targetDirectionY * 5f;
    //interpVelocity = new Vector3(0, interpVelocityY, 0);
    float targetPosY = posY + interpVelocityY * Time.deltaTime;
    //targetPos = new Vector3(0, targetPosY, 0);
    transform.position = new Vector3(
          transform.position.x
        , Mathf.Lerp(posY, targetPosY, 0.125f)
        , transform.position.z
    );
}

using UnityEngine;
using System.Collections;

public class Ragdoll : MonoBehaviour
{
    public Rigidbody[] bones;
    public Animator animator;
    public bool isDead;

    void Start()
    {
        bones = GetComponentsInChildren<Rigidbody>();   
        animator = GetComponent<Animator>();
    }

    void Update()
    {
        if (isDead)
            KillRagdoll();
    }

    void KillRagdoll()
    {
        foreach (Rigidbody ragdoll in bones)
        {
            ragdoll.isKinematic = false;
        }
        if (animator)
            animator.enabled = false;
    }
}