I was slightly hit from behind while waiting at a stop sign. The lady driving behind me left her foot off her break and hit me at less than 5MPH. I felt the impact and thinking there was gonna be damage. I couldn't believe when I got out to look there was no damage at all except for some slight scratches that be buffed out. I just wanted to know should I be concerned if anything was damaged internally inside the bumper? I was just quite surprised that there was no external damage whatsoever. Thanks for anyone's help in advance!