I was reminded of the importance of stagecraft recently. I went to a concert where the artist was clearly nervous and inexperienced performer. They apologised and said they were nervous and told us that they didn't want to speak to the audience, and when finished, took all the stuff off the violin. They were then asked to do an encore but hadn't prepared us one and told us so, but then played anyway - not properly prepared - so she had to stop and sort her violin. Well it will have been part of the learning curve for her and no doubt she will never go on stage again without having an encore prepared. We should all be as well prepared as possible and know whether or not we might be asked to do an encore. Try not to show any sign of being worried if possible - it spreads to the audience! Performing is so difficult. We were worried too! Anyway, if by any chance, the person concerned reads this - well done for having the courage to get up on stage and you will have learned a lot which you can use in the future.