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My Backyard Playground
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 â 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. Loading... Please Log In / Sign Up
