One of my favourite episodes of Star Trek: The Next Generation is when a crew member comes back from some R&R on a distant planet, and brings with them a game.
It’s a computer game that you play via a special pair of glasses, the aim being to use your concentration to deposit virtual spinning discs into randomly appearing cones. It soon becomes apparent that something else is going on, as more sets of the glasses are replicated and the entire crew becomes so obsessed they cease to function, becoming addicted to the endorphin release that the game triggers. Even Captain Picard succumbs - I know! Interestingly it is left to youth, in the shape of Wesley Crusher, to save the day.
My recent visit to Estonia included a weekend off, and during that time, I did some Yoga and Pilates classes. I don’t speak the language, but I nevertheless found it relatively easy to follow instructions. I think this reflects some important points about basic levels of communication.