I recall attending a concert by a well-known Canadian performer - soft seat, not a bar - when a cell phone rang. The owner answered the phone and said,"Hello."
The performer asked,"Could I speak to your friend?"
The owner of the phone, probably thinking that his friend would like to talk to a celebrity, handed the phone over.
The performer said into the phone,"He's at a concert and will call you back." He then said something like,"Since you don't know enough to turn off your phone at a concert, I'll do it for you. Come and get it back at the end of the night."
The audience applauded.