This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. Embed Code Restart Playing WATCH MORE VIDEOS FROM THIS EPISODE > An elementary school teacher recalls being in her classroom one morning when “all of a sudden it felt like a truck hit me in the head.” Caroline knew something was horribly wrong and that she needed to see a doctor immediately. Hear her story. ShareTweet