one of my good friends got hit a couple years ago, and felt fine for weeks. one day out of no where he got a really bad headache and started blacking out... nest thing he knows he is in the hospital with brain swelling and almost died. the doctors said it was directly caused by his accident. ill have to ask him again exactly how it happened. not trying to scare you, but you need to be carefull about that stuff. he did end up getting like $13,000.00 for pain and suffering.