You can say it to me any time. But I am Dutch. We are very direct. (In general of course, persons always differ.) So direct others find us impolite. And we have a very flat culture in companies. For me, the manager is not a 'better person' than the girl from administration. If my manager talks crap, I tell him: you are saying crap. I even told the CEO (big chief, many feathers) he was talking nonsense once. But, may-be I am a little cheeky, because I am technically that brilliant they won't fire me anyway.