That is funny that they put the stickers on the windows so you can get a picture of the creature! Maybe all of the fish are gone because the monster ate them all :). The tubing on the rapids looks cool. I can see myself getting bashed into the rocks though. I think I would worry about that more than tipping over! The tubing we do in the US, is much more relaxed and gradual!
My wife was not keen on the tubing, especially after she went under
Tubing over here is like a lazy river. Just floating and drinking!