Pretty much my go to app whenever I am showing someone the Vive for the first time is Richie's Plank Experience. It's just too much fun to watch how different people react to being immersed in a world where you ride an elevator to the top floor of a tower block only to have the door open and a sole plank set out before you. I have found that around 50% of the adults that I have shown this too actually can't do it! Those that do often exhibit fear, lack of balance and anxiety.