Hello,I wonder if any of you experienced teachers can help me out here. Why is it that once a piece(say... late intermediate, advanced and beyond) is mastered, memorized and all, ready for performance in front of an audiance, suddenly falls apart!!??Places where things used to be ok(notes, etc. under control) now become problematic. I've experienced this as a student and now as a teacher with some of my students. I recall my own teacher telling me that is quite normal but to be honest never inquired further as to why. So here I am trying to get to the bottom of this since I want to be able in turn to explain why to my students. I'm not looking for how to solve the problem rather an explanation as to why it happens. Your responces will be greatly appreciated