HUMMER’s Design Director Carl Zipfel doesn’t have to go very far to seek out adventure. In fact, all he has to do is step out his back door. He designed a dirt bike track in his backyard. It’s a family thing too – even his three children are fixtures on the track. He also describes how his passion for extreme sports played a role in the 2009 H3T Alpha. Check out the video for Carl’s story, and a look at the pre-production model of the H3T Alpha.