I love this thread.
My previous girlfriend refused to drive a car. Said she was not safe and could not do it. Was terrified to try. Then she went out and bought one of those little moped type things and would drive it right down the road in heavy traffic without a worry. :S
My grandma used to be a terrible back seat driver always telling grandpa how to drive even though she never got a license herself. After they got older he would just shut his hearing aid off so that he would not have to listen to her.