Interrupting you while you try to make a point (talking)
Bad etiquette or lack of it thereof, bad social manners. We all have little habits and we all argue, have discussions and talk. There are times when we also need to listen when others are trying to speak or make their case. Some of us often want our voice to be heard first. Common courtesy is that you allow the other person to finish before speaking.
Six out of ten said they found it annoying. Four admitted they don't mind as they themselves do it at times.