First and foremost how old are your tires?? The screeching sound is not becos of the worn out tyres but other factors.... like u got a lousy tyres installed onto the car.... and maybe corning a sharp angle at a fast speed....
The lose of control might be becos of wet road, oil or sand... orelse you brake too hard while trying to stop the car into the speed for cornering.... some parts of the road actually cannot be turned fast without going into the opposite lane.... so it is best to train up ur judgement be4 attempting going downslope.....

But like I always says value ur life and license dudes....
