I witnessed a similar incident.
I was at a seminar, in a packed hall, At the beginning of the presentation the very first thing the presenter did was ask everyone to turn off their cell phones. About 20 minutes into the speech someones cell phone rang, LOUD, as the guy answered it the speaker stopped and the hall was dead silent except for the guy on the phone. It only lasted a couple of seconds and the female speaker says "Honey, can you bring me a towel, I'm wet and naked and there no towels in this bathroom." The guy on the phone jumps up and runs out of the hall as the entire hall erupts in laughter. The guy never did come back.