Holy Shit! That's disturbing. If you watch the two videos of the crashes, the difference is that in the first crash in 2007 (i think) he rolled his head forward towards his chest allowing a natural "summer salt roll if you will. In this new one his head rolled back causing the catastrophic injuries. If he'd been able to roll his head forward again he might have possibly not been injured this time either.
Very sad, especially when I realized that I have a son his age.
Rest in Peace young man.