The audience is the best judge of anything. They cannot be lied to. Truth brings them closer. A moment that lags - they're gonna cough.
Well we played with Soul Coughing once for like two days that was pretty cool. I mean they were all good you can pull a great experience from everything.
That's what happens nowadays with people working on computers. They can so easily fix things with their mouse and take out all the 'Oh somebody coughed in the background we need to take that out' - or somebody hit a bad note. Those are all the best moments.
The art of acting consists in keeping people from coughing.