Just tell whoever is tubing or skiing to think of it like a river ride at a water park where random strangers pay money to use a water cannon on you as you go by!
For the skier it should be a challenge to stay out of the stream and for a tuber it would likely be a welcome refresher during this hot week of weather.
I wouldn't hold it straight out for a long period of time, unless the riders have some information you would like to get out of them!
