Robbyn Hart talks with OUTSIDE Contributor Marc Peruzzi .  He doesn’t just report on how the rewards of risk are fueling a catastrophic trend, he lives it: he’s had five close acquaintances suffer a life-altering brain injury while skiing or biking. And while reporting this story he suffered one bike crash that left him nauseous and another that shattered his collarbone.  http://www.outsideonline.com/fitness/injury-prevention/After-the-Crash.html