If it what i think it is, you will likely encounter this more and more until it gets fixed. The horrible grinding noise is the starter not engaging fully to the flywheel. Over time, this shears more and more teeth off the flywheel, and/or starter. fwiw, when this happens to me, I just turn the car off, turn the heater blower to high, and then turn the car to the on position so it blows for a while. Turn off, and the try to start the car. Usually, this works. If not, rinse and repeat. hth
