I recall being so nervous on stage that I could not get my trembling hand to undo the button on my shirt pocket to get my capo out for the next song. I felt as if everyone could see my problem and the chuckling and/or laughing out loud would surely begin. Fortunately, my singing partner had added a few extra words to the introduction of the next song. That was all the time I needed.After the show was over someone remarked as to our "wonderful stage presence". So I guess I was the only one who knew how nervous I was after all.