Anti Joke

Tom buys his wife Mary the latest Eco friendly car. The car is said to get well over 100 miles on a tank of gas. A week later, Tom is stunned to learn that while Mary was driving to the supermarket the car ran out of gas. The tank was full and Mary only drove 5 miles. How is this possible?

Mary was involved in a horrible car accident. The gas tank immediately emptied and set fire to Mary and her baby.