When I first started to play in front of others I had to march with my instructor and play Scotland the Brave and Amazing Grace. My instructor told me where we were to march because I was marching next to him and not to his rear. Anyway, he changed his mind and direction and it flummoxed me so much that when we ended on the last note of Amazing Grace, I forgot to drain the air from my bag. While he ended crisply, my bag died a noisy death. VERY embarrassing!