I don't think I am good enough to hang with you JP. If the run is more than a few miles, it isn't great for my foot and knees. I think I would do OK on the mtb portion (I should be able to hold my own aerobically anyway). I've only kayaked once, so I know little about that - I did do a lot of canoeing in my youth (Boy Scouts) and got the merit badge. So if the canoe is swamped, I know how to get out, right it, and get back in.
I'll look for next year JP. I don't know that you'd want me doing it with you, but a sprint distance might be fun to try. Thanks for the offer!
PS: The guy climbing the hill - that's got to be one steep hill since he is so far forward I would have thought his back wheel would get no traction. Of course, if it is as steep as it looks, maybe his weight is right over the back wheel!