Funny experience

My family was in the car and we were heading for home from myrtle beach. We were talking about earths rotation when she told me last time that she asked me I answered completely wrong. She told me that it was really hard for her to keep a strait face while i was telling her the wrong answer. I thought I told her the right answer but I was wrong. She told me now and it was sad that I was thought I was right but totally wrong. Now I am just laughing because she was feeling sad for me and I was so shocked it was funny.