Once, during the intermission of a play, there was a brown out. The lights flickered. The audience mistakenly took this to be the signal that the play was resuming. They all took their seats and quietly anticipated act II. Five minutes later, the lights flickered again, only this time it was on purpose. The play resumed. Act II was good, although there was an energy lull about halfway through. Still, the audience left feeling satisfied.
But the point is, those people will never get those five minutes back.