Well we did try it, and we did it at home.
Our younger son, home from college for Easter break, brought home his birthday present -- a slackline kit. Slackline, I learned only a month ago, is similar to a tightrope -- except the line has slack and, when in use, stretches to within a few inches of the ground.
Our son is pretty adept at using the slackline -- he can even walk backwards! -- but the rest of us were rank amateurs. In the photo above left, I managed 5-7 seconds just standing still on the line. That was the highlight. In my other attempts, I was able to walk -- slowly -- but only with assistance. Fortunately, there is not too much distance to cover in a fall. Our future daughter-in-law, however, catapulted far from the line. (Right photo.)
I don't foresee taking up slackline as a hobby any time soon, but I can see why younger people enjoy it.