I drove a school bus in Atlanta Ga. I had a group of construction workers run into the back of my bus , and leave the seen. Even though I just had a headache no big deal. My boss told me to go get checked, just in case... I am thankful I did. There was 2 disc c4 and c5 out of place. This was in Nov of 2004. After many months of physical therapy, eperderal shots in my neck. April of 2005 I had to have neck surgery. Now I am fine.... So, please go to get yourself checked.. I didn't start my headache till the next day.