I am sitting with friends in a cinema watching The Lord of the Rings:The Fellowship of the Ring newly released into the wild. Six seats away a phone starts playing an 8-bit rendition of Mozart's 40th. The twat with the phone likes that piece so he lets it play for several bars, whereupon I stand up, look right at him and shout at the top of my voice "WILL YOU TURN THAT FUCKING PHONE OFF!".
Loud, enthusiastic applause from the audience.
Mr Twat answers his phone and say in a stage whisper "I have to go. Some idiot wants me to shut up".