+1 Shepard. Two years ago a local woman was riding on the front of a pontoon boat in a simialr position; fell off the bow, between the toons and into the prop. Luckily she wasn't killed but a bad day on the river. Cut really bad on the upper body.
I was out sitting on the dock last week. River was/and is up and lots of floating trash (20'-0" trees, tires, junk, etc.) I heard a noise and then saw a small bow rider come around the curve of the river PULLING A SKIER. Looked like a dad teaching his young teenage doughter how to ski. Made me so nervous, I had to leave. WOW is all I can say.
When you get too comfortable with anything, that's when it gets dangerous. No matter how experienced you are.