Sorry for excluding the details Bermuda. He was basically on a slightly downhill-graded smooth street where lots of kids bike, blade, walk dogs, etc. He was holding to a car to catch some extra speed and he somehow fell "backwards" and hit his head. I know, the car part might make you roll your eyes. However I've boarded many places and even with a car in this area, we would go no where near as fast as other hills we'd bomb helmetless
Just goes to show how quick things can happen.
BTW, he wasn't a pure idiot or anything compared to the next guy. He had just been accepted to George Washington University, was an Eagle Scout, and led the varsity track team. (I didn't know him but knew lots of younger kids that did)