A few years ago, we were in an anniversary service where they were singing a song that contained the line, "There are no Gods like Jehovah." Unfortunately, the person in charge of the PowerPoint forgot the no. Suddenly, "There are Gods like Jehovah" flashes big on the screen as the ushers frantically tried to signal the sound booth that something was up. It took at least two minutes for them to realize what was going on and change it. I personally thought that it was hilarious.
Anyone have any similar stories?