Take one part athlete, one part curious intellectual, forget to add coordination, and add a double of ambition. Best served on the rocks, this might get you close to what a Joel is. As a whitewater addict, almost all of my travels involve chasing rivers and whitewater slalom races. This sometimes makes for interesting conversations at customs trying to explain what this thing is I am carrying in a language I don't know.
If you want to get in touch, joelmccune .com works or take a look at my photo full size. It has a very easy clue.