Great article.Those are examples are of clear professionalism and class,can never be overstated.In the first story,I think clearly that this "star"has some major self esteem problems,that she addresses by trying to make others feel as badly about themselves,as she does about herself.That guitar player handing her a rose was just perfect.
I have been in situations where the band I was in used employed both methods.Stopping the tune at the very beginning,making a joke out of it,and starting again,and just keep going and "if it sounded bad the first time,it will sound at least as bad when we do it again".I find though,that the latter, usually works better when playing original material.
Hey,its life..we all make mistakes in real time.Some we admit,some we say"who me?"
Steve B