public void BallSpeedDownRemove(PowerUpHandler controller)
 {
     PaddleController.MultiplyBallSpeed(1.6f);
     foreach (GameObject ball in PaddleController.ballList)
     {
         ball.GetComponent <BallController>().MultiplySpeed(1.6f);
     }
 }
 public void BallSpeedUpRemove(PowerUpHandler controller)
 {
     PaddleController.MultiplyBallSpeed(0.625f);
     foreach (GameObject ball in PaddleController.ballList)
     {
         ball.GetComponent <BallController>().MultiplySpeed(0.625f); // 1/1.6 = 0.625
     }
 }