In a very finnish way, i would of bit my lip, stayed quiet and grumble afterwards to a friend
When i'm on the phone, at work, trying to solve problems regarding factory and there happens to be a bunch of "extras" in the room talking too damn loud so i cant hear what the other person is saying on the phone, i have said loud: "I'M SORRY WHAT WAS THAT, I CAN'T HEAR YOU BECAUSE OF THESE APES MAKING A RACKET HERE"
Usually does the trick.