void OnTriggerEnter(Collider col)
    {
        Destroyable destroyable = col.GetComponent <Destroyable>();

        if (destroyable)
        {
            //Debug.Log(counter);
            //GetComponent<AudioSource>().Play();
            Destroy(destroyable.gameObject);
        }
        //counter += 1;
        playerOwner.ProjectileDestroyed(this);
        Destroy(this.gameObject);
    }