You cannot go over the waterfall to your death when you are traveling up the river to get there. If you think about it, it would not serve me well to send clients into danger. If I won't tell you which mushrooms to eat, or to jump off the bridge into the channel, or to slide on the waterfall, why would I send you over the falls in my boat?
I speak really really good English. I also speak not so good French, and Spanish, and even worse German.
Actually, I admit it. I have been sending people to their deaths, down the waterfall getting there by going upriver, for years now! I lose a canoe every once in a while, but I get some great cars...