void OnCollisionEnter(Collision collision)
    {
        GameObject colliderRootObject = ProjectileBehaviour.getChildRootObject(collision.collider.gameObject);
        // Debug.Log(colliderRootObject.name);
        string colliderTag = colliderRootObject.tag;

        if (colliderTag == "Zombie")
        {
            explodeInstantly();
        }

        /*if (colliderTag == "Human" || colliderTag == "Zombie" || colliderTag == "Player" || colliderTag == "Projectile") {
         *      //explodeInstantly();
         * }*/
    }