The last time I took my car in to have the tires rotated, I parked my car facing downhill a little. The technician went out to get my car, sat in it for about 2 minutes, then came back in and told me he felt uncomfortable backing up my car. He was afraid that he would let it roll forward and bump the curb. I think he couldn't figure out how to put it in reverse, so I was very happy to back up the car and pull it into the garage bay for him...