2016 Subaru Outback Power Train

I WAS IN A STORE PARKING LOT. I DROVE APPROX. 2 BLOCKS AND CAME TO A FULL STOP WHERE THERE WAS A PEDESTRIAN CROSSING. I ACCELERATED MAKING A LEFT TURN AND BEGAN CLIMBING A SMALL HILL TO EXIT THE PARKING AREA. I TRAVELED APPROXIMATELY 20 FEET AND MY CAR LOST ACCELERATION. I PLACED MY FOOT ON THE GAS PEDAL AND PRESSED IT DOWN APPROX. 50 PERCENT. WHILE DOING SO, I DID NOT HEAR THE ENGINE RACING. THE SPEEDOMETER REGISTERED 2 MILES PER HOUR. I BRAKED, CAME TO A FULL STOP AND TOOK MY CAR OUT OF GEAR. I MOVED IT BACK TO DRIVE AND THE CAR RESPONDED NORMALLY.