//Doubles the player's bet, deals one more card,
    //and then stands.
    public IEnumerator DoubleDown()
    {
        player.DoubleBet();
        yield return(StartCoroutine(DealCardToPlayer()));

        yield return(new WaitForSeconds(0.5f));

        if (player.GetHandValue() > 21 && !player.CheckAces())
        {
            StartCoroutine(React(blackjackUIScript.Result.PlayerBust));
        }
        else
        {
            StartCoroutine(Stand());
        }
    }