Very nice video.
I think the audio could be a lot better with two changes (or you can completely disagree with me...):
1) The music is too heavy. Most of the Xterra videos I've seen make this mistake... if you have a clip video of people getting punched in the face repeatedly or of truly extreme flying-off-a-mountain type stuff - something with LOTS of action, then you can whip out the Rob Zombie...
Long format regular-guy offroading videos work much better with something mellow.
2) I've seen a couple videos with real audio from the camera mixed in - it works really well when it'll be music for awhile and then real audio fades in at key spots so you can hear the occasional engine revving, people talking, or metal crunching.
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Warning! Do not sear the top of your neck hole in the molten lactate extract of hoofed mammals.