Of course it's terrible. Especially when someone is telling you something you already understand and you know it'd be quicker if they would just be quiet and l

Of course it's terrible. Especially when someone is telling you something you already understand and you know it'd be quicker if they would just be quiet and let you quickly explain the solution. It's probably easier if I just start talking - hopefully they'll take the hint and shut up. In the long run everyone will be happier.