The strangest reaction was when I was in a small cinema in Pasadena to see the movie "Capote". Quite near the beginning someone a few rows forward had a cell phone ring.
My thought was tut tut, but we have all been there, she will turn it off very embarressed. But no - she answered it! - Not only answered it but spoke very loudly.
"Hi, yes, well what is about, it's a bit inconvenient right now." "Oh okay, I see yes well, what neeRAB to happen is..."
Someone shouted, "Take it outside"
She continued, "Yes you will need to be quick because.."
Someone else shouts, "oh for God's Sake" and suddenly the whole theater is murming and she says loudly, "I have to go, there are some very rude people here:

It was so incredible, so unebelievable I was actually laughing.