Nice work Peach!
Oh wow, we've got two sets of athletes now,
Ok, I might be forget to say this (or else already stated somewhere in here, i'm sorry) but while I met the Son from Utah Father/Son team, I sit close by them in the waiting room, just wanted to get their insight up close, and when the Father went to the toilet, the Son was playing around with his wheelchair, now I'm not talking about playing around like what a normal kids do, instead he was doing somekind of tricks and manuever with the wheelchair..! . I was like.. WHAaattt??! And he fell to the ground after several tricks.. And the camera and sound guy laughed so hard (me too, but i was kinda holding it pfffpfpfff )
i don't know if the above information could give a little hint, maybe he's a former BMX bicycle or Skater boy, , but he does have kinda skater's style (he wear skater's cap)
Utah was the site of the 2002 Winter Olympic Games, and all of those facilties were built for permanent use. It's also quite possible that the extreme sports skills might have come from snowboarding, as well as the possible summer extreme sports.
We've had snowboarders in recent seasons, right? so there's a lot of different ways those skills could have been developed. But I agree, that extreme sports skills may be a tanget that can be explored as far as identification.