There's 1000's that go down every day. Beginning of the season, especially this year, water is high and some of the elite guys try to do stupid things. Or stupid people do stupid things.
And it's not much work Mrs. Gooch, there's steady areas where it's just fast water with no rapids and you just cruise along for 3-10 minutes and then you hit rapids for maybe 1-2 minutes where you row in spurts of 3 or 5 every 30 seconds or so. Not difficult at all cause the guide does most of the steering. You just assist when your hitting certain points for speed.