2002 BMW 530I User Comment / Complaint

We were driving on dry tarmac on a main street in new rochelle. we were traveling at a reasonable/slow rate of speed, about 25-30 mph and approached a stop light. as we slowed to stop at the light the breaks pulsed violently. it felt as if we had run over something, but i looked and there was nothing there. we looked to see if any warning lights activated to indicate a failure - but we didn't see any. we proceed to next light, and stopped again. this time there was no problem and no pulsing. my fiance was driving, and we both were carefully monitoring the car. as we pulled away from the light to make a left turn the car accelerated dramatically. my fiancee pushed hard on the brakes but the car continued to accelerate and fish tail. then, after a couple seconds it stop and she regained control of the car.