Mine always manages to go off in the loo.... I can sit for hours all day, but as soon as I get up to go to the loo, beep beep bingley beep!

I did manage to interrupt a counselling session with it once, and it went off as soon as I set foot in the National Portrait Gallery, but haven't yet had it go off in a concert, it's usually on silent then, which doesn't help, because I forget about it and when it vibrates in my pocket I jump up and go Oooh!

LTS