An Oscar the Grouch in the crowd putting everything on hold because he/she isn't getting their way can be such a drag. Or when the "I don't think this is such a good idea guys" attitude arises, it turns into a mission to get things up and running again. You have to send in a team of serious people to try to smooth things out. People who have been in this type of situation many times have fancy tactics or tricks of doctoring the scene.
I know of a quick-fix as well for making things all better. It's proved to be successful so far.