I did it once when I was a teenager somewhere on the american river, that shit was fun.....until the guide steering the boat in the back decided he wanted to get some air....this foo hit a rapid that was shaped like a "U" and his ass flew out the boat, it was 6 of us in the boat, the two people in the front flew onto the people in the middle, one of which was me, making me twist my ankle and sock the woman behind me in the jaw with my fist around the oar and the other adult on the other side flew out the boat.....but besides that the shit was fun