This is why you can't trust anyone to work on your car.

When I was still a teenager, my mother took an after work course on car maintenance, taught by one of the men that worked with her. Then she did her own oil change at home and guess who was the next person to use her car. As I was driving from Philly to the shore in NJ, on a double date, halfway there I see a smoke trail following us! I worked in a gas station, so I knew that an oil filter won't seal if you've left the old rubber O ring stuck to the block. After borrowing a filter wrench, I see that is exactly what she did. What an embarrassment! Not to mention the burns I got on my hands and arms trying to fix this on a 100 degree plus day!