In all my years this has never happened to me before. I got nailed in the noggin with a rock from a truck ahead of me on the highway, driving with the top down. No real damage - I was waiting to see blood running down my forehead, but other than a lot of pain - no permanent injuries!!! A few weeks ago I got a cracked windshield form another rock - need a new one soon, but not before Winter is officially over... Good thing that rock didn't clobber me...