No chance I'd do that. just a couple of inches extra flow and you're gone.
As it happens my brother fell down a waterfall in the Wicklow mountains in Ireland. Not a straight drop luckily but got carried 50 metres before getting jammed in between two rocks, smashed his arm up, but it saved his life. My other brother was there and got down to him to help him out whilst waiting for mountain rescue. He went back the next day and for the life of him couldn't work out how he'd managed to get down to help. Guess adrenaline has a lot to answer for.
All good now except for setting off airport alarms.