As i was going down a slopping street at approximately 30-35 mph, i stepped on the brakes to slow decline but car surged forward, immediately gaining speed up to 58 mph. when i leveled out at the bottom of the hill i was able to pull over to side of road by tapping on the brakes until i came to a complete stop. second incident happened two days later. while stopped at a stop sign waiting to turn left, car accelerated forward going from 0 to approximately 30 mph barely missing car coming at me from the left. was in middle of the road before i knew it. stopped car as before, light repeated taps on brakes. car is at jaguar dealership for inspection. *tr