In all cases of heart-ache, the application of another man's disappointment draws out the pain and allays the irritation.
What you have to remember, when you get to the level of seeing 10,000 people a night, is that they've all paid to have a performance. I need to make sure that they get their money's worth. I don't want to be going on stage and saying, "I'm just going to try some stuff and if it doesn't work, it doesn't matter," because it does matter.